在点击按钮的时候不能停止，求条件语句代码
慕斯卡6904759
2018-07-05 21:20
<!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);
}
</script>
</head>
<body>
<form>
<input type="text" id="count" />
<input type="button" value="start" onclick="startCount()"/>
</form>
</body>
</html>
4回答
-
- 一叶红尘
- 2018-07-29 13:42:00
这个很有意思 当多点击几次按钮，计数会越来越快！！！
-
- qq_抛物线_0
- 2018-07-09 23:40:48
clearInterval(timer); 先清除一下定时器，document.getElementById('status').value = 2 设置值
-
- 慕斯卡6904759
- 2018-07-08 22:09:35
clearInterval(timer);
document.getElementById('status').value = 2;
这个是什么意思呢？谢谢
-
- qq_抛物线_0
- 2018-07-06 09:06:15
<!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;
var timer = null;
function startCount() {
var statusValue = document.getElementById('status').value;
if (statusValue == 1) {
clearInterval(timer);
document.getElementById('status').value = 2;
timer = setInterval(function () {
num = num + 1;
document.getElementById('count').value = num;
}, 1000);
document.getElementById('btn').value = "暂停";
} else {
clearInterval(timer);
document.getElementById('btn').value = "开始";
document.getElementById('status').value = 1;
}
}
</script>
</head>
<body>
<form>
<input type="hidden" id="status" value="1">
<input type="text" id="count">
<input id="btn" type="button" value="开始" onclick="startCount()">
</form>
</body>
</html>
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