将页面部分jS代码转为JQuary代码

app/views/bids/_homework.html.erb

@@ -25,7 +25,6 @@
         function show()
         {
             $("#what_is_project_div").slideToggle();
-
         }
 	</script>
 </div>

app/views/homework_attach/edit.html.erb

@@ -1,10 +1,10 @@
 <script type="text/javascript">
     function switchTab(ProTag) {
         var display_index = 3 - ProTag;
-        document.getElementById("tab" + ProTag).className = "selected";
-        document.getElementById("tab" + display_index).className = "";
-        document.getElementById("content" + ProTag).style.display = "";
-        document.getElementById("content" + display_index).style.display = "none";
+        $("#tab" + ProTag).attr("class","selected");
+        $("#tab" + display_index).attr("class","");
+        $("#content" + ProTag).show();
+        $("#content" + display_index).hide();
     }
 </script>