<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>计时器</title>
</head>
<script type="text/javascript">
window.onload = function(){
var num = 0;
function startCount(){
document.getElementById("count").value = num;
num = num+1;
setTimeout(startCount,1000); //为什么这里不能用setTimeout("startCount()",1000);
}
startCount();
}
</script>
</head>
<body>
<form>
<input type="text" id="count" />
</form>
</body>
</html>
3 回答
B1anker
TA贡献3条经验 获得超0个赞
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>计时器</title>
</head>
<script type="text/javascript">
var num=0;
function startCount() {
document.getElementById('count').value=num;
num=num+1;
setTimeout("startCount()",1000);
}
setTimeout("startCount()",1000);//还有这里为什么不能用startCount();
</script>
</head>
<body>
<form>
<input type="text" id="count" />
</form>
</body>
</html>
B1anker
TA贡献3条经验 获得超0个赞
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>计时器</title>
</head>
<script type="text/javascript">
var num=0;
function startCount() {
document.getElementById('count').value=num;
num=num+1;
setTimeout("startCount()",1000);
}
setTimeout("startCount()",1000);//还有这里为什么不能用startCount();
</script>
</head>
<body>
<form>
<input type="text" id="count" />
</form>
</body>
</html>
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