tools =
{
    addEvent: function(obj, type, fn) {
        if (obj.attachEvent) {
            obj['e' + type + fn] = fn;
            obj[type + fn] = function() { obj['e' + type + fn](window.event); }
            obj.attachEvent('on' + type, obj[type + fn]);
        } else
            obj.addEventListener(type, fn, false);
    },

    openWindow: function(url, winName, features) {
        child = window.open(url, winName, features);
        child.focus();
    }
}