var __defaultFired = false;

function WebForm_FireDefaultButton(event, target) {
        var element = event.target || event.srcElement;
        if (!__defaultFired && 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" ) {
            __defaultFired = true;
            defaultButton.click();
            event.cancelBubble = true;
            if (event.stopPropagation) event.stopPropagation();
            return false;
        }
        else if (defaultButton && typeof(defaultButton.href) == "string" && defaultButton.href.substring(0,11) == "javascript:") {
            __defaultFired = true;
            eval(unescape(defaultButton.href.substring(11,defaultButton.href.length)));
            event.cancelBubble = true;
            if (event.stopPropagation) event.stopPropagation();
            return false;
        }


    }
    return true;
}