function popup(url, width, height, options) {
	popupwin = window.open(url, "popup", "width=" + width + ",height=" + height + (options ? "," + options : ""));
	popupwin.focus();
	return false;
}
function popUp(url)
{
	var links = (screen.width/2)-(450);
	var oben = (screen.height/2)-(300);
	var new_window = window.open(url,"popup","height=600,width=900,status = no,toolbar = no,menubar = no,location = no,resizable = no,titlebar = no,scrollbars = no,fullscreen = no,top ="+oben+",left ="+links);
	new_window.focus();
}