让我们保持简单.如果您想要解释发生了什么,请告诉我:
<html>
<head>
<script type="text/javascript">
setTimeout (function(){
document.getElementById('submitButton').disabled = null;
},10000);
var countdownNum = 10;
incTimer();
function incTimer(){
setTimeout (function(){
if(countdownNum != 0){
countdownNum--;
document.getElementById('timeLeft').innerHTML = 'Time left: ' + countdownNum + ' seconds';
incTimer();
} else {
document.getElementById('timeLeft').innerHTML = 'Ready!';
}
},1000);
}
</script>
</head>
<body>
<form>
<input type="submit" disabled="disabled" id="submitButton" />
<p id="timeLeft">Time Left: 10 seconds</p>
</form>
</body>
</html>
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