diff --git a/core/src/main/resources/org/apache/spark/ui/static/webui.js b/core/src/main/resources/org/apache/spark/ui/static/webui.js
index f01c567ba58a..76570d5e7b80 100644
--- a/core/src/main/resources/org/apache/spark/ui/static/webui.js
+++ b/core/src/main/resources/org/apache/spark/ui/static/webui.js
@@ -83,4 +83,11 @@ $(function() {
   collapseTablePageLoad('collapse-aggregated-rdds','aggregated-rdds');
   collapseTablePageLoad('collapse-aggregated-activeBatches','aggregated-activeBatches');
   collapseTablePageLoad('collapse-aggregated-completedBatches','aggregated-completedBatches');
+});
+
+$(function() {
+    // Show/hide full job description on click event.
+    $(".description-input").click(function() {
+        $(this).toggleClass("description-input-full");
+    });
 });
\ No newline at end of file