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 && typeof defaultButton.click != "undefined") { defaultButton.click(); event.cancelBubble = true; if (event.stopPropagation) { event.stopPropagation(); } return false; } } return true;
}