diff --git a/sortt.js b/sortt.js
index 2dda20c..5487e6f 100644
--- a/sortt.js
+++ b/sortt.js
@@ -8,10 +8,12 @@
 
 */
 
-/////////////////////////////////////////////////
-// Be sure you already have loaded jQuery !!!  //
-/////////////////////////////////////////////////
 
+// test if jQuery is available
+if(!window.jQuery)
+{
+	console.log("sortt.js: ERROR no jQuery found!");
+} else {
 
 //use JQuery to bind event on each <th> with a "data-sortt" attribute
 $('th').each(function() {
@@ -23,6 +25,7 @@ $('th').each(function() {
         });
 });
 
+}
 
 //create global function with main routine
 window.sortt=function(normsort,revsort,isdefault){