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 89622106ff1f0..cf04db28804c1 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
@@ -87,4 +87,11 @@ $(function() {
   collapseTablePageLoad('collapse-aggregated-runningExecutions','aggregated-runningExecutions');
   collapseTablePageLoad('collapse-aggregated-completedExecutions','aggregated-completedExecutions');
   collapseTablePageLoad('collapse-aggregated-failedExecutions','aggregated-failedExecutions');
-});
\ No newline at end of file
+});
+
+$(function() {
+    // Show/hide full job description on click event.
+    $(".description-input").click(function() {
+        $(this).toggleClass("description-input-full");
+    });
+});