var win_popup_ui = null;

	function popup_uploadimage(id, session_name, session_id){
		var adresse = 'popup_uploadimage.php?' + session_name + '=' + session_id + '&feld_id=' + id;
		
		if(win_popup_ui != null){
			win_popup_ui.close();
		}
		
		win_popup_ui = window.open(adresse, "NewImage", "width=1100,height=650,left=25,top=25,scrollbars=yes,resizable=no");
		
	}