function popup(url, imgname) {

	var windowwidth = 780;
	var windowheight = 420;
	var y = parseInt((window.screen.availWidth - windowwidth)/2);
	var x = parseInt(((window.screen.availHeight - windowheight)/2) * .9);
	eval("detailswindow \= open\(url, \"details\", \"screenX="+x+", screenY="+y+", top="+x+", left="+y+", toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=yes, resizable=yes, width="+windowwidth+", height="+windowheight+"\")");
}