Jquery UI tabs problem, how to reload the active pages with ajax when click on the current tab second time ?

Jquery UI tabs problem, how to reload the active pages with ajax when click on the current tab second time ?

My html structrue like below:
<div class="mainTabs" id="mainTab">
  <div class="tabNav">
      <ul>
         <li><a href="#mainTabs_1">home</a></li>
         <li><a href="ajax/mPage1.asp">information</a></li>
         <li><a href="ajax/mPage2.asp">project</a></li>
         <li><a href="ajax/mPage3.asp">hr</a></li>
         <li><a href="ajax/mPage4.asp">other</a></li>
         <li><a href="ajax/mPage5.asp">control panel</a></li>
      </ul>
  </div>
  <div class="mainTabContent">
   <div id="mainTabs_1" class="mainHome">html content</div>
  </div>

The first tab load normal html,and the other five tab load page with ajax. Now I have a problem ,I want reload the ajax page when I click the current tab second time. You know, the JQ ui tabs's tab has no click event when active the current tab panel.How can I fix the 'jquery.ui.tabs.js' code or the initialize code  as follow:

$( "#mainTab" ).tabs({
    beforeLoad: function( event,ui ) {    



        ui.panel.html("loading...");
      });
      ui.jqXHR.error(function() {
        ui.panel.html("load page failed");      
      });
    },
    show: {effect: "fade",duration: 200},
    hide: {effect: "fade",duration: 200},
    active:0,
    collapsible: false   
  });