网页灰色倒计时按钮

<html>
<head>
<title>同意条款</title>
</head>
<body>
<form id="form1" name="form1" method="post" action="">
<input type="submit" name="Submit" value="同意" />
</form>
<script language="javascript">
document.form1.Submit.disabled = true;
var wait = 30; //停留时间
function updateinfo(){
  if(wait == 0){
    document.form1.Submit.value = "我同意";
    document.form1.Submit.disabled = false;
  }
  else{
    document.form1.Submit.value = "阅读条款"+wait;
    wait--;
    window.setTimeout("updateinfo()",1000);
  }
}
updateinfo();
</script>
</body>
</html>

posted @ 2012-03-10 16:17  山清石玉  阅读(207)  评论(0)    收藏  举报