function imgPopup(img, title, width, height) {
	var url = "imgpopup.php5?title="+title+"&img="+img;
	x = (screen.availWidth-width) / 2;
	y = (screen.availHeight-height) / 2;
	w = window.open(url, "imgpopup", "width="+width+",height="+height+",resizable=no,screenX="+x+",screenY="+y);
	w.focus();
}