// JScript File
// Validation function library
//
String.prototype.trim = function() { return this.replace(/^\s+|\s+$/, ''); }; 


//Check if the argument contains numbers
function isNumber(arg)
{
    if (arg.match(/^\d+$/)){
        return true;
    }
    return false;
}

//Check if the argument is empty/null/spaces
function isEmpty(arg)
{
    if (arg.trim()==null || arg.trim()=="") return true;
    return false;
}

//Check if argument is a valid email address
function isEmail(arg)
{
    var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	return (filter.test(arg));
}