function ShowMedia(media_type, media_link)
{

	var winWidth = 650;
	var winHeight = 500;
	
	var leftLoc =(screen.width-winWidth)/2;
	var rightLoc =(screen.height-winHeight)/2;
	
	settings='toolbar=0,location=0,directories=0,menuBar=0,scrollbars=1,resizable=1,width=' +winWidth+ ',height=' +winHeight+',left=' +leftLoc+ ',top=' +rightLoc
	
	window.open("mediaviewer.php?media_type="+media_type+"&media_link="+media_link,"",settings);	

}