title: Blinking a div with background-color in jquery using setInterval
body: <p>the code :</p>
  
  <pre><code>&lt;div id="divtoBlink" &gt;&lt;/div&gt;
  </code></pre>
  
  <p>css:</p>
  
  <pre><code>#divtoBlink{
   width:100px;
   height:20px;
   background-color:#627BAE;
  }
  </code></pre>
  
  <p>javascript:</p>
  
  <pre><code>setInterval(function(){
    $("#divtoBlink").css("background-color","red");
    },100)
  </code></pre>
  
  <p>but nothing is happening can anyone tell me what i am doing wrong ? </p>
  
  <p>fiddle <a href="http://jsfiddle.net/F7hBz/"><code>Here</code></a></p>