title: jQuery mouseover event triggers multiple times when moving mouse quicker
body: <p>I am using jquery mouseover event to fetch some data using ajax in wordpress, ajax is working fine, but my issue is When we move the mouse over the element faster event triggers multiple actions, ie if i give an alert on mouse over if I move repeatedly over the element I will get multiple alerts, I dont want this, I have tried unbind, but not working properly. here is the </p>
  
  <pre><code>&lt;ul class="tab-content"&gt;
  &lt;li&gt;&lt;div class="place-holder"&gt;&lt;/div&gt;&lt;/li&gt;
  &lt;li&gt;&lt;div class="place-holder"&gt;&lt;/div&gt;&lt;/li&gt;
  &lt;li&gt;&lt;div class="place-holder"&gt;&lt;/div&gt;&lt;/li&gt;
  &lt;li&gt;&lt;div class="place-holder"&gt;&lt;/div&gt;&lt;/li&gt;
  &lt;/ul&gt;
  
  
  $(document).on('mouseover', '.place-holder' , function(e){
  alert ('hallo');
  }
  </code></pre>