/*
 *  Scott Andrew's Event handling
 */


function addEvent(obj, type, fn) {

    if (obj.addEventListener) {
	obj.addEventListener(type, fn, false);
	EventCache.add(obj, type, fn);
    } else 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]);
	EventCache.add(obj, type, fn);
    } else {
	obj["on" + type] = obj["e" + type + fn];
    }
}


var EventCache = function() {
    var listEvents = [];

    return {
	listEvents : listEvents,
	    add : function(node, sEventName, fHandler) {
	    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]);
		}
		
		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);