Question

为什么我这样写<a href="javascript:void(0)" onclick="showtoday()">会报NaN错误

<a href="javascript:void(0)" onclick="showtoday()"><%! Date d = new Date(); SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd"); String now = df.format(d);%><script>function showtoday(){ window.location.href="ShowToday?action=show&value="+<%=now%>;}</script>

Answer 1

<script>
function showtoday(){
	window.location.href="ShowToday?action=show&value=<%=now%>";
}
</script>

Answer 2

a是闭合标签。