<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>按钮倒计时</title>
</head>
<body>
<p>
<label><input type="submit" name="btnSubmit" />
</label>
</p>
</body>
<script language="javascript">
var n = 10;//计数器
//document.all.btnSubmit.disabled = true;
document.getElementById("btnSubmit").disabled = true;
function btnShow()
{
str = "倒计时...";
n--;
if(n <= 0)
{
document.getElementById("btnSubmit").value = "提交";
document.getElementById("btnSubmit").disabled = false;
}
else
{
document.getElementById("btnSubmit").value = str + n +"秒";
}
}
window.setInterval(btnShow,1000);
</script>
</html>