弹出页面出现重复流动条，求助！！！ - jQuery MiniUI

<body>

<div class="mini-fit" style="height:auto" borderStyle="border:0">
   <div class="mini-toolbar" style="text-align:center;line-height:20px;"
        borderStyle="border-bottom:0px;border-top:1px solid #999999;border-left:1px solid #999999;border-right:1px solid #999999">
   <span style="padding-left:5px;"></span>
        <input id="key" class="mini-textbox" style="width:50%;" />
        <a class="mini-button" iconCls="icon-search" plain="flase">查找</a>
      </div>

      <ul id="tree1" class="mini-tree" style="width:100%;height:100%;"
         showTreeIcon="true"
         url="com.vbm.ftp.ct.resAcct.itemTreeQuery.biz.ext"
         textField="itemName"
         idField="itemCode"
         parentField="parentCode"
         resultAsTree="false"
         expandOnLoad="false"
         dataField="itemTreeArr"

         expandOnDblClick="false"
         >
      </ul>

</div>
<div class="mini-toolbar" style="text-align:center;padding-top:8px;padding-bottom:8px;"
      borderStyle="border-left:0;border-bottom:0;border-right:0;">
      <a class="mini-button" style="width:60px;">确定</a>
      <span style="display:inline-block;width:25px;"></span>
      <a class="mini-button" style="width:60px;">取消</a>
</div>

</body>