var __defaultFired = false;
function WebForm_FireDefaultButton(event, target) {
    if (!__defaultFired && event.keyCode == 13 && !(event.srcElement && (event.srcElement.tagName.toLowerCase() == "textarea"))) {
        var defaultButton;
        if (__nonMSDOMBrowser)
            defaultButton = document.getElementById(target);
        else
            defaultButton = document.all[target];

        if (typeof (defaultButton.click) != "undefined") {
            __defaultFired = true;
            defaultButton.click();
            event.cancelBubble = true;

            if (event.stopPropagation) event.stopPropagation();
            return false;
        }

        if (typeof (defaultButton.href) != "undefined") {
            __defaultFired = true;
            eval(defaultButton.href.substr(11));
            event.cancelBubble = true;

            if (event.stopPropagation) event.stopPropagation();
            return false;
        }

    }
    return true;
}