function enter(e) {
    var e = e ? e : window.event;
    var keycode = e.which ? e.which : e.keyCode;

    return (e.keyCode == 13);
}

//-------------------ENABLE click IN FIREFOX---------------------------------
var browser = navigator.userAgent.toLowerCase();
var ie = ((browser.indexOf("msie") != -1) && (browser.indexOf("opera") == -1));

if (!ie) {
    HTMLElement.prototype.click = function() {
        var evt = this.ownerDocument.createEvent('MouseEvents');
        evt.initMouseEvent('click', true, true, this.ownerDocument.defaultView, 1, 0, 0, 0, 0, false, false, false, false, 0, null);
        this.dispatchEvent(evt);
    }
}
function noenter() {
    return !(window.event && window.event.keyCode == 13);
}