function popup(theURL,features) {
	var winName="noname"
	x = (document.all) ? 'left=' : 'screenX=';
	y = (document.all) ? 'top=' : 'screenY=';
	window.open(theURL,winName,features+','+(x+(screen.width-750)/2)+','+(y+(screen.height-550)/2));
}