jsp中点击验证码刷新验证码

<a href="javascript:refreshCode()"> <img src="${pageContext.request.contextPath}/checkCodeServlet" title="看不清点击刷新" id="vcode"/> </a> <script type="text/javascript"> // 切换验证码 function refreshCode() { // 获取验证码图片对象 var vcode = document.getElementById("vcode"); // 设置src属性，加上时间戳 vcode.src="${pageContext.request.contextPath}/checkCodeServlet?time=" + new Date().getTime(); } </script>