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设置倒计时10秒可用的按钮JS函数(转)

2011-01-13 10:59 513 查看

方式一:

<input value="同 意" type="submit" name="rulesubmit" />
<script>
var secs = 9;
var wait = secs * 1000;
document.bbrules.rulesubmit.value = "同 意(" + secs + ")";
document.bbrules.rulesubmit.disabled = true;
function update(num) {
if(num == (wait/1000)) {
document.bbrules.rulesubmit.value = "同 意";}
else {
var printnr = (wait / 1000) - num;
document.bbrules.rulesubmit.value = "同 意(" + printnr + ")";}
}
function timer() {
document.bbrules.rulesubmit.disabled = false;
document.bbrules.rulesubmit.value = "同 意";}
for(i = 1; i<= secs; i++) {
window.setTimeout("update(" + i + ")",i * 1000);
}
window.setTimeout("timer()", wait);

</script>

方式二:

<!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" id="btnSubmit" value="提交" />
</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>

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