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);