jsp中怎么实现点击复选框显示指定的值

图片用属性记录下班级和学号，如下

 <img cls="一班" num="1号"/>

然后jquery

     $(function () {
        $('班级checkbox 复选框选择器,学号checkbox 复选框选择器').click(function () {
            var clscb = ',' + $('班级checkbox 复选框选择器:checked').map(function () { return this.value }).get().join(',') + ','
            var numcb = ',' + $('学号checkbox 复选框选择器:checked').map(function () { return this.value }).get().join(',') + ','
            $('图片选择器').hide().each(function () {
                if (clscb == ',,' && numcb == ',,') this.style.display = ''//没有选中任何
                else {
                    var cls = this.getAttribute('cls')
                    var num = this.getAttribute('num')
                    var show = true;
                    if (clscb != ',,' && clscb.indexOf(',' + cls + ',') == -1) show = false;
                    if (show && numcb != ',,' && numcb.indexOf(',' + num + ',') == -1) show = false;
                    if (show) this.style.display = '';
                }
            })
        });
    });