function validateInteger(strValue) {
  var objRegExp  = /(^-?\d\d*$)/;

  //check for integer characters
  return objRegExp.test(strValue);
}

function isNumber(e, elem)
{
	var keynum
	var keychar
	var numcheck
	
	if(window.event) // IE
	{
		keynum = e.keyCode
	}
	else if(e.which) // Netscape/Firefox/Opera
	{
		keynum = e.which
	}
	if(keynum==8 || keynum==46|| keynum==37|| keynum==39|| keynum==9 || keynum==13) return true;
	keychar = String.fromCharCode(keynum)
	numcheck = /(^-?\d\d*$)/;
	return numcheck.test(keychar) && elem.value.length < 2
}