<script language=javascript> function check(){ var xz=document.getElementById("xz"); alert(xz.checked); } </script> <html> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <input type=checkbox name="xz" id="xz" value=1> <input type=submit name=s1 value="提交" onclick="return check();"> </html>