Operation of tabs in js

<!--tabs 选项卡--><h1>tabs 选项卡</h1><!--tabs 选项卡:动态添加选项卡--><p style="margin-bottom:10px">　<a href="#" class="easyui-linkbutton" onclick="addTabB(&#39;google&#39;,&#39;http://www.google.com&#39;)">google</a>　<a href="#" class="easyui-linkbutton" onclick="addTabB(&#39;jquery&#39;,&#39;http://jquery.com/&#39;)">jquery</a>　<a href="#" class="easyui-linkbutton" onclick="addTabB(&#39;easyui&#39;,&#39;http://jeasyui.com/&#39;)">easyui</a></p>
<!--tabs 选项卡定义-->
<p id=&#39;tabsId&#39; class="easyui-tabs" style="width:500px;
    height:250px;
    ">　<p title="Tab1" style="padding:20px;
    display:none;
    ">　tab1　</p>　<p title="Tab2" data-options="closable:true" style="overflow:auto;
    padding:20px;
    display:none;
    ">　tab2　</p>　<p title="Tab3" data-options="iconCls:&#39;icon-reload&#39;,closable:true" style="padding:20px;
    display:none;
    ">　tab3　</p> </p>
//动态添加选项卡方法function addTab(title, url) {
    if ($(&#39;#tt&#39;).tabs(&#39;exists&#39;, title)) {
    $(&#39;#tt&#39;).tabs(&#39;select&#39;, title);
}
else {
    var content = &#39;<iframe scrolling="auto" frameborder="0" src="&#39;+url+&#39;" style="width:100%;
    height:100%;
    "></iframe>&#39;;
    $(&#39;#tt&#39;).tabs(&#39;add&#39;, {
    title:title,　content:content,　closable:true　}
);
}
}