function addLoadEvent(func) 
{
	addDOMLoadEvent(func);
}

function addOnMouseOver(obj, func)
{
	var oldmouseover = obj.onmouseover;
	if(typeof obj.onmouseover != 'function')
	{
		obj.onmouseover = func;
	}
	else{
		obj.onmouseover = function()
		{
			oldmouseover();
			func();
		}
	}
}
function addOnMouseOut(obj, func)
{
	var oldmouseout = obj.onmouseout;
	if(typeof obj.onmouseout != 'function')
	{
		obj.onmouseout = func;
	}
	else{
		obj.onmouseover = function()
		{
			oldmouseout();
			func();
		}
	}
}
function addOnClick(obj, func)
{
	var oldclick = obj.onclick;
	if(typeof obj.onclick != 'function')
	{
		obj.onclick = func;
	}
	else{
		obj.onclick = function()
		{
			oldclick();
			func();
		}
	}
}

addDOMLoadEvent = (function(){
    // create event function stack
    var load_events = [],
        load_timer,
        script,
        done,
        exec,
        old_onload,
        init = function () {
            done = true;

            // kill the timer
            clearInterval(load_timer);

            // execute each function in the stack in the order they were added
            while (exec = load_events.shift())
                exec();

            if (script) script.onreadystatechange = '';
        };

    return function (func) {
        // if the init function was already ran, just run this function now and stop
        if (done) return func();

        if (!load_events[0]) {
            // for Mozilla/Opera9
            if (document.addEventListener)
                document.addEventListener("DOMContentLoaded", init, false);

            // for Internet Explorer
            /*@cc_on @*/
            /*@if (@_win32)
                document.write("<script id=__ie_onload defer src=//0><\/scr"+"ipt>");
                script = document.getElementById("__ie_onload");
                script.onreadystatechange = function() {
                    if (this.readyState == "complete")
                        init(); // call the onload handler
                };
            /*@end @*/

            // for Safari
            if (/WebKit/i.test(navigator.userAgent)) { // sniff
                load_timer = setInterval(function() {
                    if (/loaded|complete/.test(document.readyState))
                        init(); // call the onload handler
                }, 10);
            }

            // for other browsers set the window.onload, but also execute the old window.onload
            old_onload = window.onload;
            window.onload = function() {
                init();
                if (old_onload) old_onload();
            };
        }

        load_events.push(func);
    }
})();