function fs_popupCentered(url) {
		
		var popupWidth    = 810; 
		var popupHeight   = 610;
		var popX 					= (screen.width - popupWidth) / 2;
		var popY					= (screen.height - popupHeight) / 2;
		var windowUrl			= url ; 
		var windowOptions = "width="+ popupWidth +", height="+ popupHeight + ", top="+ popY +", left="+ popX + ", status=yes, toolbar=no, location=no ,scrollbars=1";
	
		//NOTE: dont use a variable or a string with spaces in it for window title, IE doesnt like it at all
		//and it the title is ignored by both browsers anyway !
		var windowObject	= window.open(windowUrl, 'window_title_is_ignored', windowOptions);
	}