Index: trunk/admin/include/tabs.js
===================================================================
diff -u -N -r203 -r251
--- trunk/admin/include/tabs.js	(.../tabs.js)	(revision 203)
+++ trunk/admin/include/tabs.js	(.../tabs.js)	(revision 251)
@@ -264,4 +264,11 @@
 {
 	// checks of parameter is passed to function (cross-browser)
 	return typeof(param) == 'undefined' ? false : true;
+}
+
+function SetBackground(element_id, img_url)
+{
+	// set background image of element specified by id
+	var el = document.getElementById(element_id);
+	el.style.backgroundImage = 'url('+img_url+')';
 }
\ No newline at end of file