<table name=agree border="0" cellpadding="10" cellspacing="0" align=center width="80%">
<tr align=center>
<td width="50%" align="right">
<form name=register method=post action=reg_shang.asp?action=yes>
<input type="hidden" name="action" value="agree"><input class="go-wenbenkuang" type=submit value=" 同意注册 " name=submit>
</form>
</td>
<td width="50%" align="left">
<form action=index.asp method=post><input class=go-wenbenkuang type=submit value=" 我不同意 "></form></td>
</tr>
</table>

<script>
 secs = 60; // number of secs to delay -china-studio
 wait = secs * 100;
 document.forms.register.submit.disabled =true;
 for(i=1;i<=(wait/100);i++) {
  window.settimeout("doupdate(" + i + ")", i * 100);
 }
 window.settimeout("timer()", wait); h:P?T@e~.aD/cm! [ 本 资 料 来 源 于 贵 州 学 习 网 网页设计Javascript教程 http://Www.gzU521.com ] h:P?T@e~.aD/cm!

 function doupdate(num) {
  if(num == (wait/100)) {
   document.forms.register.submit.value = " 同意注册 ";
  } else {
   wut = (wait/100)-num;
   document.forms.register.submit.value = " 同意前请先阅读 (" + wut + ")";
  }
 }

 function timer() {
  document.forms.register.submit.disabled =false;
}
</script>