var videoWindow=null;
 function popup(target, w, h) {
	var options='width='+(w+1)+',height='+(h+1)
	if(screen)
		options+=',screenY='+((window.screen.availHeight-h)/2)+',screenX='+((window.screen.availWidth-w)/2);
	/*alert(options);*/
	if(videoWindow && !videoWindow.closed &&videoWindow.location) {
		videoWindow.location=target;
		videoWindow.focus();
		videoWindow.resizeTo(w, h);
	} else {
		videoWindow = window.open(target, 'videoWindow', options);

	}
	return false;
 }