验证码代码，验证码全套代码

<!-- 验证码 --> <tr> <td nowrap width="437"></td> <td> <img id="img" src="${projectName}/authImage" /> <a href='#' onclick="javascript:changeImg()"><label>看不清？</label></a> </td> </tr> <!-- 触发JS刷新--> <script type="text/javascript"> function changeImg(){ var img = document.getElementById("img"); img.src = "${projectName}/authImage?date=" + new Date();; } </script>