///function to check for special characters
		function check_special_chars(data, iChars)
		{
			 //var iChars = "!@#$%^*+=-[]\\\'/{}|\":<>?~_"; 
   			for (var i = 0; i < data.length; i++) 
   			{
	  			if (iChars.indexOf(data.charAt(i)) != -1) 
	  			{
		  	  		alert ("Your entry has special characters. \nThese are not allowed.");
		  			return false;
  				}
  			}
		}