/*
    Samples für AddEvent
    
    S1)
    addEvent(window, 'load', function(evt) { alert('loaded!'); });
    
    S2)
    function foo(evt) {
        ...
    }
    
    addEvent(window, 'load', foo);
    
*/

function addEvent(obj, evType, fn) {
    if (obj.addEventListener) {
        obj.addEventListener(evType, fn, false);
        return true;
    } else if (obj.attachEvent) {
        var r = obj.attachEvent("on" + evType, fn);
        return r;
    } else {
        return false;
    }
}