前台代码：

<a href="javascript:;" onclick="repeat()"><div id="modal_volume" style="position: fixed; text-align: center; width: 100%; height: 100%; top: 0; z-index: 9999; display: none;"><table style="width: 100%; height: 100%;"><tr><td align="center" style=""><div style="width: 900px; position: relative"><a href="zjb_enroll?course=专业课提高班"><img src="Content/images/tanchuang.jpg" /></a><a href="javascript:$('#modal_volume').fadeOut();" style="display: block; width: 45px; height: 45px; position: absolute; right: 11px; top: 10px; z-index: 2"></a></div></td></tr></table>
</div>

js代码：

    <script>function repeat() {$('#modal_volume').fadeIn();}</script>