added dom

FromJavaScriptTojQuery-master/04-jQuery-TraversingMtDOM/08-other_traversing_methods_challenge_2/js/script.js

@@ -0,0 +1,9 @@
+//will wait until page ready
+$(document).ready(function() {
+    /*when table header is clicked , removes selection class from all other table rows and
+      adds the selection class to this table headers row only*/
+    $("th").click(function(){
+     	$("tr").children().removeClass("selection");
+        $(this).siblings().addClass("selection");
+    });
+});