ÿþfunction addEvent(elem, evtType, func, capture) {

    capture = (capture) ? capture : false;

    if (elem.addEventListener) {

        elem.addEventListener(evtType, func, capture);

    } else if (elem.attachEvent) {

        elem.attachEvent("on" + evtType, func);

    } else {

        elem["on" + evtType] = func;

    }

}



function removeEvent(elem, evtType, func, capture) {

    capture = (capture) ? capture : false;

    if (elem.removeEventListener) {

        elem.removeEventListener(evtType, func, capture);

    } else if (elem.attachEvent) {

        elem.detachEvent("on" + evtType, func);

    } else {

        elem["on" + evtType] = null;

    }

}



function addOnLoadEvent(func) {

    if (window.addEventListener || window.attachEvent) {

        addEvent(window, "load", func, false);

    } else {

        var oldQueue = (window.onload) ? window.onload : function() { };

        window.onload = function() {

            oldQueue();

            func();

        }

    }

}