function test(id,error)
	{
		var text1 = document.getElementById(id).value;
		var iChars = "!@#$%^&*()+=[]\';,./{}|\":<>?";
	  	for (var i = 0; i < text1.length; i++) 
	  	{
		  	if (iChars.indexOf(text1.charAt(i)) != -1) 
		  		{
				  	alert( error + "could not has special characters");
				  	return false;
		  		}
		 }
		return true;
	 }
	 
function hasWhiteSpace(id,mess) 
					{
					     var t = document.getElementById(id).value;
					     reWhiteSpace = new RegExp(/\s/);
					     // Check for white space
					     if (reWhiteSpace.test(t)) {
					          alert(" vui long nhap vao " + mess + " ! ");
					          return false;
					     }
					return true;
					}
				 
	 function Trim(s){
		while ((s.substring(0,1) == ' ') || (s.substring(0,1) == '\n') || (s.substring(0,1) == '\r')){
			s = s.substring(1,s.length);
		}
		while ((s.substring(s.length-1,s.length) == ' ') || (s.substring(s.length-1,s.length) == '\n') || (s.substring(s.length-1,s.length) == '\r')){
			s = s.substring(0,s.length-1);
		}
		return s;
	}