/*vietuni8.js - R.19.10.01 @JOTREQFA@P*Veni*Vidi*Vici*
* by Tran Anh Tuan [tuan@physik.hu-berlin.de] 
* Copyright (c) 2001, 2002 AVYS e.V.. All Rights Reserved.
*
* Originally published and documented at http://www.avys.de/
* You may use this code without fee on noncommercial web sites. 
* You may NOT alter the code and then call it another name and/or resell it.
* The copyright notice must remain intact on srcipts.
*/

// interface for HTML:
         
var supported = (document.all || document.getElementById);
var disabled = false;
var charmapid = 1;
var keymodeid = 0;
var linebreak = 0;
var theTyper = null;

//--------------Added by BV.HUNG-----
var	Kbrd = 'telex';
function ChangeLinkHref(name) {
	name.href =	name.href +	'&Kbrd=' + Kbrd;
}

function initVietTyper(mode,font){
  setTypingMode(mode);
  switch (font)	{
	 case 'utf8'  :	charmapid = 1; break;
	 case 'vni'	  :	charmapid = 5; break;
	 case 'tcvn'  :	charmapid = 6; break;
	 case 'viscii':	charmapid = 7; break;
	 case 'vps'	  :	charmapid = 8; break;
	 case 'viqr'  : charmapid = 9; break;
	 default	  :	charmapid = 6;
 }
}
//---------------End BV.HUNG---------
reset = function(){}
telexingVietUC = initTyper;

function setTypingMode(mode) {
  keymodeid = mode;
  if (theTyper) theTyper.keymode= initKeys();
  if (!supported && !disabled) {
    disabled = true;  
  }
}
initCharMap = function() { return new CVietUniCodeMap(); }
initKeys = function() {
  switch (keymodeid) {
    case 1: return new CTelexKeys();
    case 2: return new CVniKeys();
    case 3: return new CViqrKeys();
    default: return new CVKOff();
  }
}
function initTyper(txtarea) {
  txtarea.vietarea= true;
  txtarea.onkeyup= null;
  if (!supported) return;
  txtarea.onkeypress= vietTyping;
  txtarea.getCurrentWord= getCurrentWord;
  txtarea.replaceWord= replaceWord;
  txtarea.onkeydown= onKeyDown;
  txtarea.onmousedown= onMouseDown;
}

function getEvt(evt) {
  return document.all? event.keyCode: (evt && evt.which)? evt.which: 0;
}

function onKeyDown(evt) {
  var c= getEvt(evt);
  if ((c==10) || (c==13)) { reset(1); linebreak= 1; }
  else if ((c<49) && (c!=16) && (c!=20)) { linebreak= 0; reset(c==32); }
  return true;
}

function onMouseDown(evt) { reset(0); linebreak= 0; return true; }

function vietTyping(evt) {
  var c= getEvt(evt);
  if(theTyper) theTyper.value= this.getCurrentWord();
  else theTyper= new CVietString(this.getCurrentWord());
  var changed= (c>32) && theTyper.typing(c);
  if (changed) this.replaceWord(theTyper.value);
  return !changed; 
}

function getCurrentWord() {
  if(!document.all) return this.value;
  var caret = this.document.selection.createRange();
  var backward = -10;
  do {
    var caret2 = caret.duplicate();
    caret2.moveStart("character", backward++);
  } while (caret2.parentElement() != this && backward <0);
  this.curword = caret2.duplicate();
  return caret2.text;
}

function replaceWord(newword) {
  if(!document.all) { this.value= newword; return; }
  this.curword.text = newword;
  this.curword.collapse(false);
}
// end interface

// "class": CVietString
//
function CVietString(str) {
  this.value= str;
  this.keymode= initKeys();
  this.charmap= initCharMap();
  this.ctrlchar= '-';
  this.changed= 0;

  this.typing= typing;
  this.Compose= Compose;
  this.findCharToChange= findCharToChange;
  return this;
}

function typing(ctrl) {
  this.changed = 0;
  this.ctrlchar = String.fromCharCode(ctrl);
  if (linebreak) linebreak= 0; else this.keymode.getAction(this);
  return this.changed;
}

function Compose(type) {
  var info = this.findCharToChange(type);
  if (!info) return;
  var telex;
  if (info[0]=='\\') telex= [1,this.ctrlchar,1];
  else if (type>6) telex= this.charmap.getAEOWD(info[0], type, info[3]);
  else telex= this.charmap.getDau(info[0], type);
  if (!(this.changed = telex[0])) return;
  this.value = this.value.replaceAt(info[1],telex[1],info[2]);
  if (!telex[2]) { spellerror= 1; this.value+= this.ctrlchar; }
}

function findCharToChange(type) {
  var lastchars= this.charmap.lastCharsOf(this.value, 5);
  var i= 0, c=lastchars[0][0], chr=0;
  if (c=='\\') return [c,this.value.length-1,1];
  if (type==15) while (!(chr=this.charmap.isVD(c))) {
    if ((c < 'A') || (i>=4) || !(c=lastchars[++i][0])) return null;
  }
  else while( "cghmnpt".indexOf(c)>=0) {
    if ((c < 'A') || (i>=2) || !(c=lastchars[++i][0])) return null;
  }
  c = lastchars[0][0].toLowerCase();
  var pc = lastchars[1][0].toLowerCase();
  var ppc = lastchars[2][0].toLowerCase();
  if (i==2 && type<6) {
    var tmp = pc + c;
    if ((tmp!="ng") && (tmp!="ch") && (tmp!="nh")) return null;
    if (tmp=="ch" && type!=1 && type!=3) return null; 
  }
  else if (i==1 && type<6) {
    if((c=='g') || (c=="h")) return null;
    if ("cpt".indexOf(c) >=0 && type!=1 && type!=3) return null; 
  }
  else if (i==0 && type!=15) {
    if ( (chr=this.charmap.isVowel(lastchars[1][0]))
      && ("uyoia".indexOf(c)>=0) && !this.charmap.isUO(pc,c)
      && !((pc=='o' && c=='a') || (pc=='u' && c=='y'))
      && !((ppc=='q' && pc=='u') || (ppc=='g' && pc=='i')) ) ++i;
    if (c=='a' && (type==9 || type==7)) i= 0;
  }
  c= lastchars[i][0];
  if ((i==0 || chr==0) && type!=15) chr= this.charmap.isVowel(c);
  if (!chr) return null;
  var clen= lastchars[i][1], isuo=0;
  if ((i>0) && (type==7 || type==8 || type==11)) {
    isuo=this.charmap.isUO(lastchars[i+1][0],c);
    if (isuo) { chr=isuo; clen+=lastchars[++i][1]; isuo=1; }
  }
  var pos= this.value.length;
  for (var j=0; j<= i; j++) pos -= lastchars[j][1];
  return [chr, pos, clen, isuo];
}
// end CVietString


// character-map template
//
function CVietCharMap() {
this.vietchars = null;
this.length = 149;
return this; 
}

CVietCharMap.prototype.charAt = function(ind) { 
  var chrcode = this.vietchars[ind];
  return chrcode ? String.fromCharCode(chrcode) : null; 
}

CVietCharMap.prototype.isVowel = function(chr) {
  var ind = this.length-5;
  while ((chr != this.charAt(ind)) && ind) --ind;
  return ind;
}

CVietCharMap.prototype.isVD = function (chr) {
  var ind = this.length-5;
  while ((chr != this.charAt(ind)) && (ind < this.length)) ++ind;
  return (ind<this.length)? ind: 0;
}
                         
CVietCharMap.prototype.isCol = function (col, chr){
  var i=12, ind=col+1;
  while (i>=0 && (this.charAt(i*12+ind)!=chr)) --i; 
  return (i>=0)? i*12+ind : 0;
}

CVietCharMap.prototype.isUO = function (c1, c2) {
  if (!c1 || !c2) return 0;
  var ind1= this.isCol(9, c1);
  if (!ind1) ind1= this.isCol(10, c1);
  if (!ind1) return 0;
  var ind2= this.isCol(6, c2);
  if (!ind2) ind2= this.isCol(7, c2);
  if (!ind2) ind2= this.isCol(8, c2);
  if (!ind2) return 0;
  return [ind1,ind2];
}

CVietCharMap.prototype.getDau = function (ind, type) {
  var accented= (ind < 25)? 0: 1;
  var ind_i= (ind-1) % 24 +1;
  var charset= (type == 6)? 0 : type;
  if ((type== 6) && !accented) return [0];
  var newind= charset*24 + ind_i;
  if (newind == ind) newind= ind_i;
  return [1, this.charAt(newind), newind>24 || type==6];
}

var map=[
[7,7,7,8,8, 8,9,10,11,15],
[0,3,6,0,6, 9,0, 3, 6, 0],
[1,4,7,2,8,10,1, 4, 7, 1]
];
CVietCharMap.prototype.getAEOWD = function (ind, type, isuo) {
  var c=0, i1=isuo? ind[0]: ind;
  var vc1= (type==15)? (i1-1)%2 : (i1-1)%12;
  if (isuo) {
    base= ind[1]-(ind[1]-1)%12;
    if (type==7 || type==11) c= this.charAt(i1-vc1+9)+this.charAt(base+7);
    else if (type==8) c= this.charAt(i1-vc1+10)+this.charAt(base+8);
    return [c!=0, c, 1];
  }
  var i= -1, shift= 0, del= 0;
  while (shift==0 && ++i<map[0].length) {
    if (map[0][i]==type) {
      if(map[1][i]==vc1) shift= map[2][i]-vc1;
      else if(map[2][i]==vc1) shift= map[1][i]-vc1;
    }
  }
  if (shift==0) {
    if (type==7 && (vc1==2 || vc1==8)) shift=-1;
    else if ((type==9 && vc1==2) || (type==11 && vc1==8)) shift=-1;
    else if (type==8 && (vc1==1 || vc1==7)) shift=1;
    del= 1;
  } else del=(shift>0);
  return [shift!=0, this.charAt(i1+shift), del];
}

CVietCharMap.prototype.lastCharsOf = function (str, num) {
  if (!num) return [str.charAt(str.length-1),1];
  var vchars = new Array(num);
  for (var i=0; i< num; i++) vchars[i]= [str.charAt(str.length-i-1),1];
  return vchars;
}
// end CVietCharMap prototype


String.prototype.replaceAt= function(i,newchr,clen) {
  return this.substring(0,i)+ newchr + this.substring(i+clen);
}

// output map: class CVietUniCodeMap
// 
function CVietUniCodeMap(){ var map = new CVietCharMap();
map.vietchars = new Array(
"UNICODE",
97, 226, 259, 101, 234, 105, 111, 244, 417, 117, 432, 121,
65, 194, 258, 69, 202, 73, 79, 212, 416, 85, 431, 89,
225, 7845, 7855, 233, 7871, 237, 243, 7889, 7899, 250, 7913, 253,
193, 7844, 7854, 201, 7870, 205, 211, 7888, 7898, 218, 7912, 221,
224, 7847, 7857, 232, 7873, 236, 242, 7891, 7901, 249, 7915, 7923,
192, 7846, 7856, 200, 7872, 204, 210, 7890, 7900, 217, 7914, 7922,
7841, 7853, 7863, 7865, 7879, 7883, 7885, 7897, 7907, 7909, 7921, 7925,
7840, 7852, 7862, 7864, 7878, 7882, 7884, 7896, 7906, 7908, 7920, 7924,
7843, 7849, 7859, 7867, 7875, 7881, 7887, 7893, 7903, 7911, 7917, 7927,
7842, 7848, 7858, 7866, 7874, 7880, 7886, 7892, 7902, 7910, 7916, 7926,
227, 7851, 7861, 7869, 7877, 297, 245, 7895, 7905, 361, 7919, 7929,
195, 7850, 7860, 7868, 7876, 296, 213, 7894, 7904, 360, 7918, 7928,
100, 273, 68, 272);
return map;
}

// input methods: class C...Keys
function CVietKeys() {
  this.getAction= function(typer) { 
    var i= this.keys.indexOf(typer.ctrlchar.toLowerCase());
    if(i>=0) typer.Compose(this.actions[i]);
  }
  return this;
}

function CVKOff() {
  this.off = true;
  this.getAction= function(){};
  return this;
}

function CTelexKeys() {
  var k= new CVietKeys();
  k.keys= "sfjrxzaeowd";
  k.actions= [1,2,3,4,5,6,9,10,11,8,15];
  k.istelex= true;
  return k;
}
             
function CVniKeys() {
  var k= new CVietKeys();
  k.keys= "0123456789";
  k.actions= [6,1,2,4,5,3,7,8,8,15];
  return k;
}

function CViqrKeys() {
  var k= new CVietKeys();
  k.keys= "\xB4/'`.?~-^(*+d";
  k.actions= [1,1,1,2,3,4,5,6,7,8,8,8,15];
  return k;
}

// end vietuni8.js

/*vumaps.js [optional]
* this file is part of the VIETUNI typing tool 
* by Tran Anh Tuan [tuan@physik.hu-berlin.de]
* Copyright (c) 2001, 2002 AVYS e.V.. All Rights Reserved.
*/

if (typeof(initCharMap) != 'undefined') {
  initCharMap = selectMap;
  if (theTyper) theTyper.charmap = initCharMap();
  vumaps = 1;
}
                        
function selectMap(id) {	
  var map = id? id: charmapid;
  switch (map) {
     case 1: return new CVietUniCodeMap();
     case 5: return new CVietVniMap();
     case 6: return new CVietTCVNMap();
     case 7: return new CVietVISCIIMap();
     case 8: return new CVietVPSMap();
     case 9: return new CVietViqrMap();
     default: return new CVietUniCodeMap();
  }
}

///////////////////////////

CVietCharMap.prototype.lowerCaseOf = function (chr, ind) {
  var i = ind? ind: this.isVowel(chr);
  if(i) return (i && ((i-1)%24 >= 12))? this.charAt(i-12): this.charAt(i); 
  if(!result[1]) result[1]= this.lowerCaseOf(0,charset*24 + ind_i); 
}

CVietCharMap.prototype.indexOf = function (chr,isnumber) {
  var c = isnumber? String.fromcharCode(chr) : chr;
  var ind = this.length-1;
  while ((c != this.charAt(ind)) && (ind > 0)) --ind;
  return ind;
}

CVietCharMap.prototype.regExpAt = function (i) {
  var c=this.charAt(i);
  return c? new RegExp(c,'g') : 0;
}

CVietCharMap.prototype.convertTxtTo = function (txt, newmap) {
  var i, regexp, res;
  for (i=this.length-1; i>0; i--) {
    if(regexp=this.regExpAt(i)) txt= txt.replace(regexp, "::"+i+"::");
  }
  while (res = /::(\d+)::/gi.exec(txt)) {
    regexp = new RegExp("::"+res[1]+"::",'g');
    txt= txt.replace(regexp, newmap.charAt(parseInt(res[1],10)));
  }
  return txt;
}

function CVietTCVNMap() { var map = new CVietCharMap();
map.vietchars = new Array(
 "TCVN-3",
 97, 169, 168, 101, 170, 105, 111, 171, 172, 117, 173, 121, 
 65, 162, 161, 69, 163, 73, 79, 164, 165, 85, 166, 89,
 184, 202, 190, 208, 213, 221, 227, 232, 237, 243, 248, 253,
 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 181, 199, 187, 204, 210, 215, 223, 229, 234, 239, 245, 250,
 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 185, 203, 198, 209, 214, 222, 228, 233, 238, 244, 249, 254,
 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 182, 200, 188, 206, 211, 216, 225, 230, 235, 241, 246, 251,
 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 183, 201, 189, 207, 212, 220, 226, 231, 236, 242, 247, 252,
 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 100, 174, 68, 167);
return map;
}

function CVietVISCIIMap() { var map = new CVietCharMap();
map.vietchars = new Array(
"VISCII",
97, 226, 229, 101, 234, 105, 111, 244, 189, 117, 223, 121,
65, 194, 197, 69, 202, 73, 79, 212, 180, 85, 191, 89,
225, 164, 237, 233, 170, 237, 243, 175, 190, 250, 209, 253,
193, 8222, 129, 201, 352, 205, 211, 143, 8226, 218, 186, 221,
224, 165, 162, 232, 171, 236, 242, 176, 182, 249, 215, 207,
192, 8230, 8218, 200, 8249, 204, 210, 144, 8211, 217, 187, 376,
213, 167, 163, 169, 174, 184, 247, 181, 254, 248, 241, 220,
8364, 8225, 402, 8240, 381, 732, 353, 8220, 8221, 382, 185, 0,
228, 166, 198, 235, 172, 239, 246, 177, 183, 252, 216, 214,
196, 8224, 0, 203, 338, 8250, 8482, 8216, 8212, 339, 188, 0,
227, 231, 199, 168, 173, 238, 245, 178, 222, 251, 230, 219,
195, 0, 0, 710, 141, 206, 0, 8217, 179, 157, 255, 0,
100, 240, 68, 208);
return map;
}


function CVietVPSMap() { var map = new CVietCharMap();
map.vietchars = new Array(
"VPS-Win",
97, 226, 230, 101, 234, 105, 111, 244, 214, 117, 220, 121,
65, 194, 710, 69, 202, 73, 79, 212, 247, 85, 208, 89,
225, 195, 161, 233, 8240, 237, 243, 211, 167, 250, 217, 353,
193, 402, 141, 201, 144, 180, 185, 8211, 157, 218, 173, 221,
224, 192, 162, 232, 352, 236, 242, 210, 169, 249, 216, 255,
0, 8222, 0, 215, 8220, 181, 188, 8212, 0, 168, 175, 178,
229, 198, 165, 203, 338, 206, 8224, 182, 174, 248, 191, 339,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
228, 196, 163, 200, 8249, 204, 213, 176, 170, 251, 186, 8250,
129, 8230, 0, 222, 8221, 183, 189, 732, 376, 209, 177, 0,
227, 197, 164, 235, 205, 239, 245, 8225, 171, 219, 187, 207,
8218, 0, 0, 254, 8226, 184, 0, 8482, 166, 172, 0, 0,
100, 199, 68, 241);
return map;
}


function CVietMultibyteMap(superior) { 
var map= superior? superior: new CVietCharMap();

map.maxchrlen = 3;

map.charAt = function (ind) { 
  return this.vietchars[ind];
}

// return an array of num vietchars with variable length: [[chr,len][]..]
// extracted from str in reversed order
//
map.lastCharsOf = function (str, num) {
  var vchar = null;
  var i= this.maxchrlen;
  var mystr = str;
  while (!vchar && (i > 1)) {
    var c = mystr.substring(mystr.length-i);
    if (this.indexOf(c)) vchar=[c, i]; 
    --i;
  }
  if (!vchar) vchar=[mystr.charAt(mystr.length-1), 1]; 
  if (!num) return vchar;
  var vchars = new Array(num);
  vchars[0]= vchar; 
  for ( i=1; i< num; i++) {
    mystr= mystr.substring(0,mystr.length-vchars[i-1][1]);  
    vchars[i]= this.lastCharsOf(mystr);
  }
  return vchars;
}

return map;
}

function CVietVniMap() { var map = new CVietMultibyteMap();
map.maxchrlen = 2;    
map.vietchars = new Array(
"VNI-WIN",
"a","a\xe2","a\xea","e","e\xe2","i","o","o\xe2","\xf4","u","\xf6","y",
"A","A\xc2","A\xca","E","E\xc2","I","O","O\xc2","\xd4","U","\xd6","Y",
"a\xf9","a\xe1","a\xe9","e\xf9","e\xe1","\xed","o\xf9","o\xe1","\xf4\xf9","u\xf9","\xf6\xf9","y\xf9",
"A\xd9","A\xc1","A\xc9","E\xd9","E\xc1","\xcd","O\xd9","O\xc1","\xd4\xd9","U\xd9","\xd6\xd9","Y\xd9",
"a\xf8","a\xe0","a\xe8","e\xf8","e\xe0","\xec","o\xf8","o\xe0","\xf4\xf8","u\xf8","\xf6\xf8","y\xf8",
"A\xd8","A\xc0","A\xc8","E\xd8","E\xc0","\xcc","O\xd8","O\xc0","\xd4\xd8","U\xd8","\xd6\xd8","Y\xd8",
"a\xef","a\xe4","a\xeb","e\xef","e\xe4","\xf2","o\xef","o\xe4","\xf4\xef","u\xef","\xf6\xef","\xee",
"A\xcf","A\xc4","A\xcb","E\xcf","E\xc4","\xd2","O\xcf","O\xc4","\xd4\xcf","U\xcf","\xd6\xcf","\xce",
"a\xfb","a\xe5","a\xfa","e\xfb","e\xe5","\xe6","o\xfb","o\xe5","\xf4\xfb","u\xfb","\xf6\xfb","y\xfb",
"A\xdb","A\xc5","A\xda","E\xdb","E\xc5","\xc6","O\xdb","O\xc5","\xd4\xdb","U\xdb","\xd6\xdb","Y\xdb",
"a\xf5","a\xe3","a\xfc","e\xf5","e\xe3","\xf3","o\xf5","o\xe3","\xf4\xf5","u\xf5","\xf6\xf5","y\xf5",
"A\xd5","A\xc3","A\xdc","E\xd5","E\xc3","\xd3","O\xd5","O\xc3","\xd4\xd5","U\xd5","\xd6\xd5","Y\xd5",
"d","\xf1","D","\xd1");  
return map;
}

function CVietViqrMap() { var map = new CVietMultibyteMap();
map.vietchars = new Array(
 "VIQR",
 "a","a^","a(","e","e^","i","o","o^","o+","u","u+","y",
 "A","A^","A(","E","E^","I","O","O^","O+","U","U+", "Y",
 "a'","a^'","a('","e'","e^'","i'","o'","o^'","o+'","u'","u+'","y'", 
 "A'","A^'","A('","E'","E^'","I'","O'","O^'","O+'","U'","U+'","Y'", 
 "a`","a^`","a(`","e`","e^`","i`","o`","o^`","o+`","u`","u+`","y`", 
 "A`","A^`","A(`","E`","E^`","I`","O`","O^`","O+`","U`","U+`","Y`", 
 "a.","a^.","a(.","e.","e^.","i.","o.","o^.","o+.","u.","u+.","y.", 
 "A.","A^.","A(.","E.","E^.","I.","O.","O^.","O+.","U.","U+.","Y.", 
 "a?","a^?","a(?","e?","e^?","i?","o?","o^?","o+?","u?","u+?","y?", 
 "A?","A^?","A(?","E?","E^?","I?","O?","O^?","O+?","U?","U+?","Y?", 
 "a~","a^~","a(~","e~","e^~","i~","o~","o^~","o+~","u~","u+~","y~", 
 "A~","A^~","A(~","E~","E^~","I~","O~","O^~","O+~","U~","U+~","Y~",
 "d","dd","D","DD");

map.regExpAt = function(ind) {
  var c=this.charAt(ind);
  if (!c) return null;
  c = c.replace(/\+/g, "[\\+\\*]");
  c = c.replace(/'/g, "['´]");
  c = c.replace(/([\-\?\.\(\^])/g, "\\$1");
  c = c.replace(/(d)d/gi, "$1$1|\\-$1|$1\\-");
  return new RegExp(c,'g');
}

map.convertTxtTo = function (txt, newmap) {
  var i, regexp, res, tmp;
//  txt= txt.replace(/([\.\?]\s+[A-Z])/g, ";;;$1");
  txt= txt.replace(/(\.\.+|\?\?+)/g, ";;;$1");
//  txt= txt.replace(/([\.\?])(\s*[\n\r])/g, ";;;$1$2");
  while (res=/(\.[\w\@\-\.\/\\][\w\@\-\.\/\\][\w\@\-\.\/\\]+\s*)/g.exec(txt)){
    regexp= res[1].replace(/([\.\?\+\-\(\^\*\@\\)\]\}])/g,"\\$1");
    tmp= res[1].replace(/\./g,";;;.;;;");
    txt= txt.replace(new RegExp(regexp,'g'), tmp);
  }
  for (i=this.length-1; i>0; i--) {
    if(regexp=this.regExpAt(i)) txt= txt.replace(regexp, "::"+i+"::");
  }
  while (res = /::(\d+)::/gi.exec(txt)) {
    regexp = new RegExp("::"+res[1]+"::",'g');
    txt= txt.replace(regexp, newmap.charAt(parseInt(res[1],10)));
  }
  txt= txt.replace(/;;;/g,"");
  return txt;
}

return map;
}
// Combined Unicode (somewhat like VNI): character + ton mark
//
function CVietCombUCMap() { var map = new CVietMultibyteMap(new CVietUniCodeMap());
  map.maxchrlen = 2;
  var viettm = new Array("UNICODE-C", 769, 768, 803, 777, 771); // ('`.?~)

  for (var i = 1; i < map.length-4; i++ ) {
    var i_char = (i-1)%24;
    var i_tm = (i - i_char - 1)/24;
    var base_c = map.vietchars[i_char+1];
    if (i<25) base_c = String.fromCharCode(base_c);
    var tonmark = String.fromCharCode(viettm[i_tm]);
    map.vietchars[i] = i_tm? base_c + tonmark : base_c;
  }
  for (var i = map.length-4; i < map.length; i++ ) {
    map.vietchars[i] = String.fromCharCode(map.vietchars[i]);
  }
  return map;
}



























//Post code ---------------------------------------------------------------------------------


helpstat = false;
stprompt = false;
basic = true;

function thelp(swtch){
	if (swtch == 1){
		basic = false;
		stprompt = false;
		helpstat = true;
	} else if (swtch == 0) {
		helpstat = false;
		stprompt = false;
		basic = true;
	} else if (swtch == 2) {
		helpstat = false;
		basic = false;
		stprompt = true;
	}
}

function AddText(text) {
	var tarea = document.FormThemTinTuc.NoiDung;
	if (typeof tarea.selectionStart != 'undefined'){ // if it supports DOM2
		start = tarea.selectionStart;
		end = tarea.selectionEnd;
		tarea.value = tarea.value.substr(0,tarea.selectionStart)
			+ text + tarea.value.substr(tarea.selectionEnd);
		tarea.focus();
		tarea.selectionStart = ((start - end) == 0) ? start + text.length : start;
		tarea.selectionEnd = start + text.length;
	} else {
		if (tarea.createTextRange && tarea.caretPos) {
			var caretPos = tarea.caretPos;
			caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ?   text + ' ' : text;
		}
		else {
			tarea.value += text;
		}
		tarea.focus(caretPos);
	}
}

function bold() {
	var text = getText();
	if (helpstat) {
		alert("Bold Tag Makes the enclosed text bold.\n\nUSE: [b]This is some bold text[/b]");
	} else if (basic) {
		AddTxt="[b]" + text + "[/b]";
		AddText(AddTxt);
	} else {
		if (text) {
			txt=prompt("Text to be made BOLD.",text);
		} else {
			txt=prompt("Text to be made BOLD.","Text");
		}
		if (txt!=null) {
			AddTxt="[b]"+txt+"[/b]";
			AddText(AddTxt);
		}
	}
}

function italicize() {
	var text = getText();
	if (helpstat) {
		alert("Italicize Tag Makes the enclosed text italicized.\n\nUSE: [i]This is some italicized text[/i]");
	} else if (basic) {
		AddTxt="[i]" + text + "[/i]";
		AddText(AddTxt);
	} else {
		if (text) {
			txt=prompt("Text to be italicized",text);
		} else {
			txt=prompt("Text to be italicized","Text");
		}
		if (txt!=null) {
			AddTxt="[i]"+txt+"[/i]";
			AddText(AddTxt);
		}
	}
}

function underline() {
	var text = getText();
  	if (helpstat) {
		alert("Underline Tag Underlines the enclosed text.\n\nUSE: [u]This text is underlined[/u]");
	} else if (basic) {
		AddTxt="[u]" + text + "[/u]";
		AddText(AddTxt);
	} else {
		if (text) {
			txt=prompt("Text to be Underlined.",text);
		} else {
			txt=prompt("Text to be Underlined.","Text");
		}
		if (txt!=null) {
			AddTxt="[u]"+txt+"[/u]";
			AddText(AddTxt);
		}
	}
}

function strike() {
	var text = getText();
	if (helpstat) {
		alert("Strike-Through Tag Makes the enclosed text have a line through it.\n\nUSE: [s]This is some stricken text[/s]");
	} else if (basic) {
		AddTxt="[s]" + text + "[/s]";
		AddText(AddTxt);
	} else {
		if (text) {
			txt=prompt("Text to be stricken.",text);
		} else {
			txt=prompt("Text to be stricken.","Text");
		}
		if (txt!=null) {
			AddTxt="[s]"+txt+"[/s]";
			AddText(AddTxt);
		}
	}
}

function left() {
	var text = getText();
 	if (helpstat) {
		alert("Left tag aligns the enclosed text to the left.\n\nUSE: [left]This text is aligned left[/left]");
	} else if (basic) {
		AddTxt="[left]" + text + "[/left]";
		AddText(AddTxt);
	} else {
		if (text) {
			txt=prompt("Text to be aligned left",text);
		} else {
			txt=prompt("Text to be aligned left","Text");
		}
		if (txt!=null) {
			AddTxt="[left]"+txt+"[/left]";
			AddText(AddTxt);
		}
	}
}

function center() {
	var text = getText();
 	if (helpstat) {
		alert("Centered tag Centers the enclosed text.\n\nUSE: [center]This text is centered[/center]");
	} else if (basic) {
		AddTxt="[center]" + text + "[/center]";
		AddText(AddTxt);
	} else {
		if (text) {
			txt=prompt("Text to be centered",text);
		} else {
			txt=prompt("Text to be centered","Text");
		}
		if (txt!=null) {
			AddTxt="[center]"+txt+"[/center]";
			AddText(AddTxt);
		}
	}
}

function right() {
	var text = getText();
 	if (helpstat) {
		alert("Right tag aligns the enclosed text to the right.\n\nUSE: [right]This text is aligned right[/right]");
	} else if (basic) {
		AddTxt="[right]" + text + "[/right]";
		AddText(AddTxt);
	} else {
		if (text) {
			txt=prompt("Text to be aligned right",text);
		} else {
			txt=prompt("Text to be aligned right","Text");
		}
		if (txt!=null) {
			AddTxt="[right]"+txt+"[/right]";
			AddText(AddTxt);
		}
	}
}

function hr() {
	var text = getText();
	if (helpstat) {
		alert("Horizontal Rule creates a horizontal line across your post.\n\nUSE: [hr]");
	} else {
		AddTxt="[hr]" + text;
		AddText(AddTxt);
	}
}

function hyperlink() {
	var text = getText();
	if (helpstat) {
		alert("Hyperlink Tag \nTurns an url into a hyperlink.\n\nUSE: [url]http://www.anywhere.com[/url]\n\nUSE: [url=\"http://www.anywhere.com\"]link text[/url]");
	} else if (basic) {
		AddTxt="[Link]" + text + "[/Link][TieuDe][/TieuDe]";
		AddText(AddTxt);
	} else {
		if (text!=null) {
			txt2=text;
		} else {
			txt2=prompt("Text to be shown for the link.\nLeave blank if you want the url to be shown for the link.","");
		}
		if (txt2!=null) {
			txt=prompt("URL for the link.","http://");
			if (txt!=null) {
				if (txt2=="") {
					AddTxt="[Link]"+txt+"[/Link][TieuDe][/TieuDe]";
					AddText(AddTxt);
				} else {
					AddTxt="[Link=\""+txt+"\"]"+txt2+"[/Link]";
					AddText(AddTxt);
				}
			}
		}
	}
}

function email() {
	if (helpstat) {
		alert("E-mail Tag Turns an e-mail address into a mailto hyperlink.\n\nUSE #1: someone\@anywhere.com \nUSE #2: [url=\"someone\@anywhere.com\"]link text[/url]");
		}
	else {
		txt2=prompt("Text to be shown for the link. Leave blank if you want the e-mail address to be shown for the link.","");
		if (txt2!=null) {
			txt=prompt("URL for the link.","mailto:");
			if (txt!=null) {
				if (txt2=="") {
					AddTxt=txt;
					AddText(AddTxt);
				} else {
					AddTxt="[url=\""+txt+"\"]"+txt2+"[/url]";
					AddText(AddTxt);
				}
			}
		}
	}
}

function image() {
	var text = getText();
	if (helpstat){
		alert("Image Tag Inserts an image into the post.\n\nUSE: [img]http://www.anywhere.com/image.gif[/img]");
	} else if (basic) {
		AddTxt="[img]"+text+"[/img]";
		AddText(AddTxt);
	} else {
		txt=prompt("URL for graphic","http://");
		if(txt!=null) {
			AddTxt="[img]"+txt+"[/img]";
			AddText(AddTxt);
		}
	}
}

function showcode() {
	var text = getText();
	if (helpstat) {
		alert("Code Tag Blockquotes the text you reference and preserves the formatting.\nUsefull for posting code.\n\nUSE: [code]This is formated text[/code]");
	} else if (basic) {
		AddTxt="[code]" + text + "[/code]";
		AddText(AddTxt);
	} else {
		txt=prompt("Enter code","");
		if (txt!=null) {
			AddTxt="[code]"+txt+"[/code]";
			AddText(AddTxt);
		}
	}
}

function quote() {
	var text = getText();
	if (helpstat){
		alert("Quote tag Quotes the enclosed text to reference something specific that someone has posted.\n\nUSE: [quote]This is a quote[/quote]");
	} else if (basic) {
		AddTxt=" [quote]" + text + "[/quote]";
		AddText(AddTxt);
	} else {
		if (text) {
			txt=prompt("Text to be quoted",text);
		} else {
			txt=prompt("Text to be quoted","Text");
		}
		if(txt!=null) {
			AddTxt=" [quote] "+txt+" [/quote]";
			AddText(AddTxt);
		}
	}
}

function list() {
	if (helpstat) {
		alert("List Tag Builds a bulleted, numbered, or alphabetical list.\n\nUSE: [list] [*]item1[/*] [*]item2[/*] [*]item3[/*] [/list]");
	} else if (basic) {
		AddTxt=" [list][*]  [/*][*]  [/*][*]  [/*][/list]";
		AddText(AddTxt);
	} else {
		type=prompt("Type of list Enter \'A\' for alphabetical, \'1\' for numbered, Leave blank for bulleted.","");
		while ((type!="") && (type!="A") && (type!="a") && (type!="1") && (type!=null)) {
			type=prompt("ERROR! The only possible values for type of list are blank 'A' and '1'.","");
		}
		if (type!=null) {
			if (type=="") {
				AddTxt="[list]";
			} else {
				AddTxt="[list="+type+"]";
			}
			txt="1";
			while ((txt!="") && (txt!=null)) {
				txt=prompt("List item Leave blank to end list","");
				if (txt!="") {
					AddTxt+="[*]"+txt+"[/*]";
				}
			}
			if (type=="") {
				AddTxt+="[/list] ";
			} else {
				AddTxt+="[/list="+type+"]";
			}
			AddText(AddTxt);
		}
	}
}

function showfont(font) {
	var text = getText();
 	if (font) {
	 	if (helpstat) {
			alert("Font Tag Sets the font face for the enclosed text.\n\nUSE: [font="+font+"]The font of this text is "+font+"[/font]");
		} else if (basic) {
			AddTxt="[font="+font+"]" + text + "[/font="+font+"]";
			AddText(AddTxt);
		} else {
			if (text) {
				txt=prompt("Text to be in "+font,text);
			} else {
				txt=prompt("Text to be in "+font,"Text");
			}
			if (txt!=null) {
				AddTxt="[font="+font+"]"+txt+"[/font="+font+"]";
				AddText(AddTxt);
			}
		}
	document.PostTopic.Font.selectedIndex = 0;
	}
}

function showsize(size) {
	var text = getText();
	if (size) {
		if (helpstat) {
			alert("Size Tag Sets the text size. Possible values are 1 to 6.\n1 being the smallest and 6 the largest.\n\nUSE: [size="+size+"]This is size "+size+" text[/size="+size+"]");
		} else if (basic) {
			AddTxt="[size="+size+"]" + text + "[/size="+size+"]";
			AddText(AddTxt);
		} else {
			if (text) {
				txt=prompt("Text to be size "+size,text);
			} else {
				txt=prompt("Text to be size "+size,"Text");
			}
			if (txt!=null) {
				AddTxt="[size="+size+"]"+txt+"[/size="+size+"]";
				AddText(AddTxt);
			}
		}
	document.PostTopic.Size.selectedIndex = 0;
	}
}

function showcolor(color) {
	var text = getText();
	if (color) {
		if (helpstat) {
			alert("Color Tag Sets the text color. Any named color can be used.\n\nUSE: ["+color+"]This is some "+color+" text[/"+color+"]");
		} else if (basic) {
			AddTxt="["+color+"]" + text + "[/"+color+"]";
			AddText(AddTxt);
		} else {
			if (text) {
		     		txt=prompt("Text to be "+color,text);
			} else {
	     			txt=prompt("Text to be "+color,"Text");
			}
			if(txt!=null) {
				AddTxt="["+color+"]"+txt+"[/"+color+"]";
				AddText(AddTxt);
			}
		}
	document.PostTopic.Color.selectedIndex = 0;
	}
}

function resizeTextarea(tmpCookieURL)
{
	var today = new Date();
	var expires = new Date(today.getTime() + 365 * 24 * 60 * 60 * 1000); // plus 365 days
	if (document.PostTopic.SelectSize.value == 1)
	{
		document.FormThemTinTuc.NoiDung.cols = 45;
		document.FormThemTinTuc.NoiDung.rows = 11;
	}
	if (document.PostTopic.SelectSize.value == 2)
	{
		document.FormThemTinTuc.NoiDung.cols = 70;
		document.FormThemTinTuc.NoiDung.rows = 12;
	}
	if (document.PostTopic.SelectSize.value == 3)
	{
		document.FormThemTinTuc.NoiDung.cols = 90;
		document.FormThemTinTuc.NoiDung.rows = 12;
	}
	if (document.PostTopic.SelectSize.value == 4)
	{
		document.FormThemTinTuc.NoiDung.cols = 130;
		document.FormThemTinTuc.NoiDung.rows = 15;
	}
	document.cookie = tmpCookieURL + "strSelectSize=" + document.PostTopic.SelectSize.value + "; expires=" + expires.toUTCString()
}

function storeCaret(ftext) {
	if (ftext.createTextRange) {
		ftext.caretPos = document.selection.createRange().duplicate();
	}
}

function getText() {
	var tarea = document.FormThemTinTuc.NoiDung;
	if (tarea.createTextRange && tarea.caretPos) {
		return tarea.caretPos.text;
	} else if (typeof tarea.selectionStart != 'undefined'){
		return tarea.value.substr(tarea.selectionStart,tarea.selectionEnd-tarea.selectionStart)
	}
	return '';
}

function OpenPreview()
{
	if (document.FormThemTinTuc.NoiDung) {
		if (trim(document.FormThemTinTuc.NoiDung.value)=="") {
			alert("Nothing to Preview!")
			return false
		}
		popupWin = window.open('pop_preview.asp', 'preview_page', 'scrollbars=yes,width=750,height=450')
		return true
	}
}

function OpenSigPreview()
{
	if (document.Form1.Sig) {
		if (trim(document.Form1.Sig.value)=="") {
			alert("Nothing to Preview!")
			return false
		}
		popupWin = window.open('pop_preview_sig.asp', 'preview_page', 'scrollbars=yes,width=750,height=450')
		return true
	}
}

function validate(){
	if (document.PostTopic.Subject) {
		if (trim(document.PostTopic.Subject.value)=="") {
			alert("You must enter a Subject")
			return false
		}
	}
	if (document.FormThemTinTuc.NoiDung) {
		if (trim(document.FormThemTinTuc.NoiDung.value)=="") {
			alert("You must enter a Message")
			return false
		}
	}
	document.PostTopic.Submit.disabled = true
	return true
}

function ResetForm(form) {
	var where_to= confirm("Do you really want to Reset the Form Fields?");
	if (where_to== true) {
		form.reset();
	}
}

//code below found here:  http://www.marzie.com/devtools/javascript/functions.asp

function ltrim(s) {
	return s.replace( /^\s*/, "" );
}
function rtrim(s) {
	return s.replace( /\s*$/, "" );
}
function trim ( s ) {
	return rtrim(ltrim(s));
}