function on(imgNr) {
	document ["menu"+imgNr].src="images/menu_0"+ imgNr +"_over.gif";
}

function off(imgNr) {
	if(imgNr!=lock) document ["menu"+imgNr].src="images/menu_0"+ imgNr +".gif";
}

function popup(img,title, comment) {
	var leftx=(screen.width-640)/2;
	var topy=100;
	loc="popup.php?img=" + img + "&title="+ title + "&comment="+ comment;
	kisablak=window.open(loc,'kep_window','width=640,height=480,left='+leftx+',top='+topy+',scrollbars=no');
}