function dp_openWindow( url, w, h, scroll, resize ) {
	
	dp_left = ( screen.width - w ) / 2;
	dp_top = ( screen.height - h ) / 2;
	
	if( scroll == null )
		scroll = "yes";
		
	if( resize == null )
		resize = "yes";
		
	var dp_windowObj = window.open( url, "popWin", "width=" + w + ", height=" + h + ", top=" + dp_top + ", left=" + dp_left + ", scrollbars=" + scroll + ", resizable=" + resize );
		dp_windowObj.focus();

}