新建问卷页面添加问卷描述提示文字

app/views/poll/_edit_head.html.erb

@@ -22,3 +22,21 @@
       <div class="cl"></div>
     </div><!--编辑头部 end-->
 <% end%>
+<script type="text/javascript">
+  $(function(){
+      if($('#polls_description_div').html().trim() == '') {
+          $('#polls_description_div').html("<p style='color:#999999'>问卷描述</p>");
+      }
+  });
+
+  $('#polls_description_div').focus(function(){
+      //alert($('#polls_description_div').html().trim());
+      if(/^\s*<\w*\s*\w*\=\"\w*\:\s*\#\d*\"\>[\u4e00-\u9fa5]*<\/\w*\>\s*$/.test($('#polls_description_div').html().trim())) {
+          $('#polls_description_div').html('');
+      }
+  }).blur(function(){
+      if($('#polls_description_div').html().trim() == '') {
+          $('#polls_description_div').html("<p style='color:#999999'>问卷描述</p>");
+      }
+  });
+</script>