var whitespace = " \t\n\r";
        var defaultEmptyOK = false;

	function isEmpty(s)
	{  return ((s == null) || (s.length == 0))
	}
	function isWhitespace (s)
	{
	  var i;
 	   for (i = 0; i < s.length; i++)
 	   {   
 	  
 	       var c = s.charAt(i);
	
 	       if (whitespace.indexOf(c) == -1) return false;
 	   }
	
 	  
	    return true;
	}

    
  function isCharsInBag (s, bag)
  {  
    var i;

    for (i = 0; i < s.length; i++)
    {   

        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) return false;
    }
    return true;
  }

	function BuildStr(s, s1)
	{
		
		s = s + s1;
		return s;
	}
           
function isEmail(s)
           { 
                if (isWhitespace(s)) return false;
           var i = 1;
           var sLength = s.length;
 

           while ((i < sLength) && (s.charAt(i) != "@"))
           { i++
           }
           if ((i >= sLength) || (s.charAt(i) != "@")) return false;
           else i += 2;
 
 
           while ((i < sLength) && (s.charAt(i) != "."))
           { i++
           }
 
 
           if ((i >= sLength - 1) || (s.charAt(i) != "."))
                return false

		else 
		 return true;

}