function checkIsDigit(e)
			{
			var keynum;
			var keychar;
			var numcheck;
			
			if(window.event) // IE
			  {
			  keynum = e.keyCode;
			  }
			else if(e.which) // Netscape/Firefox/Opera
			  {
			  keynum = e.which;
			  }
			keychar = String.fromCharCode(keynum);
			numcheck = /\d/;
			
			return numcheck.test(keychar) || keynum == 46 || keynum == 127 || keynum == 8 || keynum == 13 || (keynum >=96 && keynum <=105);
			
			}