function checkapostophe(_controlname)
{
	var controlname, chksingleflag;
	var controlmessage = "You can not enter apostophe (') in it";
	controlname = _controlname.value;
	
	for(var k = 0; k < controlname.length; k++) 
	{
		chksingleflag = controlname.charAt(k);
		if (chksingleflag == "'") 
		{
			alert(controlmessage);
			_controlname.focus();
			return false;
		}
	}
	return true;
}