function WebForm_FireDefaultButton(event, target) {
    var element = event.target || event.srcElement;
    if (event.keyCode == 13 &&
    !(element &&
    element.tagName.toLowerCase() == "textarea"))
    {
        var defaultButton;
        if (__nonMSDOMBrowser)
        {
            defaultButton = document.getElementById(target);
        }
        else
        {
            defaultButton = document.all[target];
        }
        if (defaultButton && typeof defaultButton.click != "undefined")
        {
            defaultButton.click();
            event.cancelBubble = true;
            if (event.stopPropagation)
            {
                event.stopPropagation();
            }
            return false;
        }
    }
    return true;
}