function isSemicolon(t)
   {
       var vari="";
       for(var i=0; i<t.value.length; i++)
	{
          if(t.value.substring(i,i+1) == ";")
	    vari = vari + ",";
	  else
	    vari = vari + t.value.substring(i,i+1);
	} 
	t.value=vari; 
   }       
   
  function isEmpty(Value)
    {
      for(var i=0; i<Value.length; i++)
          if (Value.substring(i,i+1) != " ")
	      return false;
	return true;
    }

WS = " \t\r\n";
function valid_email(fld) 
        {
          var i,str = fld.value;
          str = eatchars(str,WS,0,0);
          str = eatuntil(str,"@" + WS,1,0);
          str = eatchars(str,"@" + WS,1,1);
          str = eatuntil(str,".@" + WS,1,0);
          str = eatchars(str,"." + WS,1,1);
          str = eatuntil(str,"@" + WS,1,0);
          str = eatchars(str,WS,0,0);
          if (str == "")
          {
          // alert('true');
           return true;
          }
          else
          {
          // alert('false');
           alert("Enter valid Email Address");
           return false;
          }
          return true;
        }
 
 function eatchars(str,chars,min,max) {
          var i;
          if (str == null || str.length < min)
            return (null);
          for (i = 0; (i < str.length) && (i < min); ++i)
            if (chars.indexOf(str.charAt(i)) < 0)
              return (null);
          while ((i < str.length) && (!max || (i < max)))
            if (chars.indexOf(str.charAt(i)) < 0)
              break;
            else
              ++i;
          return str.substring(i);
        }

  function eatuntil(str,chars,min,max) {
          if (str == null || str.length < min)
            return (null);
          for (i = 0; (i < str.length) && (i < min); ++i)
            if (chars.indexOf(str.charAt(i)) >= 0)
              return (null);
          while ((i < str.length) && (!max || (i < max)))
            if (chars.indexOf(str.charAt(i)) >= 0)
              break;
            else
              ++i;
          return str.substring(i);
        }