String.prototype.trim = function() {
    return this.replace(/^\s*/, "").replace(/\s*$/, "");
}

function stopRKey(evt) {
    var evt = (evt) ? evt : ((event) ? event : null);
    var node = (evt.target) ? evt.target : ((evt.srcElement) ? evt.srcElement : null);
    if ((evt.keyCode == 13) && (node.type == "text")) { return false; }
    document.onkeypress = stopRKey;
}

function disableEnterKey(e) {
    var key;
    if (window.event)
        key = window.event.keyCode; //IE
    else
        key = e.which; //firefox      

    return (key != 13);
}

function HelloWorld() {
    alert("hello world");
}

function ValidateListBox(sender, args) {
    var options = document.getElementById(sender).options;
    for (var i = 0; i < options.length; i++) {
        if (options[i].selected == true) {
            args.IsValid = true;
            return;
        }
    }
    args.IsValid = false;
}