function addEvent(elm, evType, fn, useCapture) {

        if (elm.addEventListener) {

        elm.addEventListener(evType, fn, useCapture);

        return true;

        }

        else if (elm.attachEvent) {

        var r = elm.attachEvent('on' + evType, fn);

        EventCache.add(elm, evType, fn);

        return r;

        }

        else {

        elm['on' + evType] = fn;

        }

}

function getEventSrc(e) {

        if (!e) e = window.event;



        if (e.originalTarget)

        return e.originalTarget;

        else if (e.srcElement)

        return e.srcElement;

}

function addLoadEvent(func) {

var oldonload = window.onload;

        if (typeof window.onload != 'function') {

        window.onload = func;

        } else {

        window.onload =

                function() {

                oldonload();

                func();

                }

        }

}

var EventCache = function(){

        var listEvents = [];

        return {

                listEvents : listEvents,



                add : function(node, sEventName, fHandler, bCapture){

                        listEvents.push(arguments);

                },



                flush : function(){

                        var i, item;

                        for(i = listEvents.length - 1; i >= 0; i = i - 1){

                                item = listEvents[i];



                                if(item[0].removeEventListener){

                                        item[0].removeEventListener(item[1], item[2], item[3]);

                                };



                                /* From this point on we need the event names to be prefixed with 'on" */

                                if(item[1].substring(0, 2) != "on"){

                                        item[1] = "on" + item[1];

                                };



                                if(item[0].detachEvent){

                                        item[0].detachEvent(item[1], item[2]);

                                };



                                item[0][item[1]] = null;

                        };

                }

        };

}();





addEvent(window,'unload',EventCache.flush, false);