function WebForm_FireDefaultButton(event, target) 
{
    //event.srcElement doesn't work in FF so we check whether
    //it or event.target exists, using whichever is returned
    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) 
        {
            if(typeof defaultButton.click != "undefined") {
                defaultButton.click();
                event.cancelBubble = true;
                if (event.stopPropagation) 
                {
                    event.stopPropagation();
                }
                return false;
            } else {
                document.location = defaultButton.href;
            }
        }
    }
    return true;
}