本帖最后由 wujiangwei567 于 2014-04-08 15:00:17 编辑

解决方案 »

  1.   

    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
    <script>
        function b(num, n) {
            var id = num;
            $('td.xingxing img:lt(' + n + ')').attr('src', './images/xl.gif');
        }
    </script>共<span class="comment_number">$value['comment_pf_num']</span>人投&nbsp;
                            <table>            <tr>
                                                      <td class="xingxing" >
                                   <img src='./images/xm.gif' class="x1"  />
                                     <img src='./images/xm.gif' class="x2"  />
                                     <img src='./images/xm.gif' class="x3"  />
                                     <img src='./images/xm.gif' class="x4" />
                                     <img src='./images/xm.gif' class="x5" />
                                </td></tr></table>          
                                <script>                                b(1, 1);</script>
      

  2.   

    xx = $tag.find('.x'+i)[0];  返回的是DOM对象,不是jq对象
    改成
    xx = $tag.find('.x'+i); 

    xx = $tag.find('.x'+i).eq(0); 
      

  3.   

    版主的id 都没有用上,如果有多个星星的class类 怎么办,我现在从 js 刚刚准备过度到jquery ,很多不懂,望指教
      

  4.   

    <html>
    <head>
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
    </head><body><script>
        function b(num, n) {
            var id = num;
            var imgs = $('td.xingxing').children('img.x'+id);
           for(var i=0;i<imgs.length;i++){
           $(imgs[i]).attr("src",'./images/xl.gif');
           }
        }
    </script>共<span class="comment_number">22</span>人投 
                            <table>            <tr>
                                                      <td class="xingxing" >
                                   <img src='./images/xm.gif' class="x1"  />
                                     <img src='./images/xm.gif' class="x2"  />
                                     <img src='./images/xm.gif' class="x3"  />
                                     <img src='./images/xm.gif' class="x4" />
                                     <img src='./images/xm.gif' class="x5" />
                                </td>
                                <td class="xingxing" >
                                   <img src='./images/xm.gif' class="x1"  />
                                     <img src='./images/xm.gif' class="x2"  />
                                     <img src='./images/xm.gif' class="x3"  />
                                     <img src='./images/xm.gif' class="x4" />
                                     <img src='./images/xm.gif' class="x5" />
                                </td></tr></table>          
                                <script>                                b(1, 1);</script></body>
    </html>
      

  5.   

    楼主的两种方法 我均试过,不起任何作用

    <body>
    <script type="text/javascript" src="http://code.jquery.com/jquery-latest.js"></script> 
    <script type="text/javascript">
    function b(num,n){
    var id = num;
    var tag = $('.xingxing').eq(id);
    for(var i=1;i<=n;i++){
    var xx = tag.find('.x'+i).eq(0);
    xx.attr('src',"./images/xl.gif");
    }
    }
    </script>
    <table>
    <tr>
    <td class="xingxing" >
    <img src='./images/xm.gif' class="x1"  />
    <img src='./images/xm.gif' class="x2"  />
    <img src='./images/xm.gif' class="x3"  />
    <img src='./images/xm.gif' class="x4" />
    <img src='./images/xm.gif' class="x5" />
    </td>
    </tr>
    </table>
    <script>b(0,3);</script>
    </body>
      

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