//str：要处理的字符串；src：原来待替换字符串；tgt：替换为目标字符串
function replaceALL(str,src,tgt)

{

    var s =new String(str);
	var sc=new String(src);
	var tc=new String(tgt);

	var temp="";
	var start=0;
	var end=0;

    for(start=0;start<s.length;)
	{

		end=s.indexOf(sc,start);
		if(end>-1)
		{
          temp =temp+s.substring(start,end)+tc;
		  start=end+sc.length;
		  if(start>=s.length) 
			  break;
		}
		else
		{
          temp =temp+s.substring(start,s.length);
		  break;
		}
    }

    return temp;

}


/*
==================================================================

LTrim(string):去除左边的空格

==================================================================
*/
function LTrim(str)

{

    var whitespace = new String(" \t\n\r");

    var s = new String(str);

    

    if (whitespace.indexOf(s.charAt(0)) != -1)

    {

        var j=0, i = s.length;

        while (j < i && whitespace.indexOf(s.charAt(j)) != -1)

        {

            j++;

        }

        s = s.substring(j, i);

    }

    return s;

}


 
/*
==================================================================

RTrim(string):去除右边的空格

==================================================================
*/
function RTrim(str)

{

    var whitespace = new String(" \t\n\r");

    var s = new String(str);

    if (whitespace.indexOf(s.charAt(s.length-1)) != -1)

    {

        var i = s.length - 1;

        while (i >= 0 && whitespace.indexOf(s.charAt(i)) != -1)

        {

            i--;

        }

        s = s.substring(0, i+1);

    }

    return s;

}


/*
==================================================================

trim(string):去除前后空格

==================================================================
*/
function TRIM(str)

{

    return RTrim(LTrim(str));

}

 
//将汉字编码转换为UTF8
function EncodeUtf8(s1)
  {
      var s = escape(s1);
      var sa = s.split("%");
      var retV ="";
      if(sa[0] != "")
      {
         retV = sa[0];
      }
      for(var i = 1; i < sa.length; i ++)
      {
           if(sa[i].substring(0,1) == "u")
           {
               retV += Hex2Utf8(Str2Hex(sa[i].substring(1,5)));
               
           }
           else retV += "%" + sa[i];
      }
      
      return retV;
  }
  function Str2Hex(s)
  {
      var c = "";
      var n;
      var ss = "0123456789ABCDEF";
      var digS = "";
      for(var i = 0; i < s.length; i ++)
      {
         c = s.charAt(i);
         n = ss.indexOf(c);
         digS += Dec2Dig(eval(n));
           
      }
      //return value;
      return digS;
  }
  function Dec2Dig(n1)
  {
      var s = "";
      var n2 = 0;
      for(var i = 0; i < 4; i++)
      {
         n2 = Math.pow(2,3 - i);
         if(n1 >= n2)
         {
            s += '1';
            n1 = n1 - n2;
          }
         else
          s += '0';
          
      }
      return s;
      
  }
  function Dig2Dec(s)
  {
      var retV = 0;
      if(s.length == 4)
      {
          for(var i = 0; i < 4; i ++)
          {
              retV += eval(s.charAt(i)) * Math.pow(2, 3 - i);
          }
          return retV;
      }
      return -1;
  } 
  function Hex2Utf8(s)
  {
     var retS = "";
     var tempS = "";
     var ss = "";
     if(s.length == 16)
     {
         tempS = "1110" + s.substring(0, 4);
         tempS += "10" +  s.substring(4, 10); 
         tempS += "10" + s.substring(10,16); 
         var sss = "0123456789ABCDEF";
         for(var i = 0; i < 3; i ++)
         {
            retS += "%";
            ss = tempS.substring(i * 8, (eval(i)+1)*8);
            
            
            
            retS += sss.charAt(Dig2Dec(ss.substring(0,4)));
            retS += sss.charAt(Dig2Dec(ss.substring(4,8)));
         }
         return retS;
     }
     return "";
  } 
function   behindWord()   
{   
   var   e   =   event.srcElement;   
   var   r   =e.createTextRange();   
   r.moveStart( 'character ',e.value.length);   
   r.collapse(true);   
   r.select();   
}