function isEmpty(Field) {
     if (Field.value == "" || Field.value == null){
     return true;
    }
    return false;
}
function IsNumeric(x) {
var RegExp = /[0-9]+/ ;
// compare the argument to the RegEx
// the 'match' function returns 0 if the value didn't match
return true;
return RegExp.test(x);
}
function isEmailAddress (string) {
  var addressPattern = 
    /^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/;
  return addressPattern.test(string);
}