var supported = (document.all || document.getElementById);
var disabled = false;
var charmapid = 1;
var keymodeid = 0;
var linebreak = 0;
var theTyper = null;
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);
}
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];
}
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;
}
String.prototype.replaceAt= function(i,newchr,clen) {
  return this.substring(0,i)+ newchr + this.substring(i+clen);
}
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;
}
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;
}
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();
     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 CVietMultibyteMap(superior) { 
var map= superior? superior: new CVietCharMap();
map.maxchrlen = 3;
map.charAt = function (ind) { 
  return this.vietchars[ind];
}
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 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;
}
function getCookie(cookieName)
{
   var cookieValue = null;
   var posName = document.cookie.indexOf(escape(cookieName) + '=');

   if (posName != -1)
   {
      var posValue = posName + (escape(cookieName) + '=').length;
      var endPos = document.cookie.indexOf(';', posValue);
      if (endPos != -1)
      {
         cookieValue = unescape(document.cookie.substring(posValue, endPos));
      }
      else
      {
         cookieValue = unescape(document.cookie.substring(posValue));
      }
   }
   return cookieValue;
}
function setCookie(cookieName, cookieValue,path, domain, secure)
{
	var exp = new Date();
	exp.setMonth (exp.getMonth() + 6); 
   document.cookie = escape(cookieName) + '=' + escape(cookieValue)
      + ('; EXPIRES=' + exp.toGMTString())
      + (path ? '; PATH=' + path : '')
      + (domain ? '; DOMAIN=' + domain : '')
      + (secure ? '; SECURE' : '');
}
function setCookie1(cookieName, cookieValue, expires, path, domain, secure)
{
   document.cookie = escape(cookieName) + '=' + escape(cookieValue)
      + (expires ? '; EXPIRES=' + expires.toGMTString() : '')
      + (path ? '; PATH=' + path : '')
      + (domain ? '; DOMAIN=' + domain : '')
      + (secure ? '; SECURE' : '');
}


// Added by tvkarch@msn.com

function initvni() {
	var mode;
	mode = getCookie('cookiekg');
	if((mode != null) && (mode!="")) 
		setTypingMode(mode);	
}
function setmode(){
	var modes = getCookie('cookiekg');
	if(modes == 1) {
		document.frmLeftKg.Kg[0].checked = true;
		setTypingMode(1);
	}
	if(modes == 2) {
		document.frmLeftKg.Kg[1].checked = true;
		setTypingMode(2);
	}
	if(modes == 3) {
		document.frmLeftKg.Kg[2].checked = true;
		setTypingMode(3);
	}
	if(modes == 0) {
		document.frmLeftKg.Kg[3].checked = true;
		setTypingMode(0);
	}
}	
function setmodeF() {
	var modes = getCookie('cookiekg');
	if(modes == 1) setTypingMode(1);
	if(modes == 2) setTypingMode(2);
	if(modes == 3) setTypingMode(3);
	if(modes == 0) setTypingMode(0);
}