function PopupImage( url, image_size ) {
	window_width  = parseInt( image_size.split( "x" )[0] );
	window_height = parseInt( image_size.split( "x" )[1] );

	url = "popup_image.php?url=" + encodeURIComponent( url );

	window.open( url, "big_picture_window", "scrollbars,width=" + window_width + ",height=" + window_height + ",directories=false,hotkeys=false,location=false,menubar=false,resizable,status=false,toolbar=false" );
}