基于jQuery实现页面搜索功能

<div class="table">    <table>      <tr id="theader">      <th>姓名</th>      <th>性别</th>      <th>联系方式</th>    </tr>    <tr>      <td>客服</td>      <td>女</td>      <td>161654466</td>    </tr>    <tr>      <td>掌柜</td>      <td>男</td>      <td>37398378737</td>    </tr>    <tr>      <td>小二</td>      <td>男</td>      <td>37398378737</td>    </tr>    <tr>      <td>小三</td>      <td>女</td>      <td>3464653537</td>    </tr>    <tr>      <td>小四</td>      <td>女</td>      <td>37398378737</td>    </tr>    </table>    <input type="text"></input>    <input type="button" value="搜索"></input>  </div>

$(function(){    $("input[type=button]").click(function(){      var txt=$("input[type=text]").val();      if($.trim(txt)!=""){        $("table tr:not('#theader')").hide().filter(":contains('"+txt+"')").show().css("background","red");      }else{        $("table tr:not('#theader')").css("background","#fff").show();      }    });  })