日期:2014-05-17  浏览次数:20756 次

js中在试卷中,提交答案之后,如果一道题为空,我想让他回到这个没有答题的地方

 <div class="test_title">
                <h1 style="width: 330px;">
                    <a name="part1">Listening comprehension</a></h1>
            </div>
            <div class="test_con">
                Look at the pictures. Listen and tick the best answer. Here is an example.
                <br>
                Example:<br />
                <p>
                    How old is Lucy?</p>
                <p>
                    <img src="images/img_x1_01.png" width="419" height="140" /></p>
                <div class="answer">
                    <ul id="ul1">
                        <span>答案:</span>
                        <input name="radio" type="radio" value="1" id="1" onclick="radio_click('ul1',1)"
                            class="nav_1" />
                        <label class="btn_1" value="" onclick="lable_click('ul1',1,1)">
                        </label>
                        <input name="radio" type="radio" value="2" id="2" onclick="radio_click('ul1',2)"
                            class="nav_1" />
                        <label class="btn_2" value="" onclick="lable_click('ul1',2,2)">
                        </label>
        &