fantme
2019-09-22 10:16
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>计时器</title>
<script type="text/javascript">
function clock(){
var time = new Date();
document.getElementById("clock").value = time;
}
var i = setInterval(clock,100);
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50" />
<input type="button" value="Stop" onclick="clearInterval(i)"/>
<input type="button" value="continue" onclick="setInterval(i)"">
</form>
</body>
</html>
把这个替换成
<input type="button" value="continue" onclick="setInterval(clock,100);">
<!DOCTYPE HTML><html><head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>计时器(暂停/开始)</title>
<script type="text/javascript">
var timer = null;
ooop();
function ooop() {
if (!timer) {
timer = setInterval( function clock(){
var time = new Date();
document.getElementById("clock").value = time.getHours()+":"+time.getMinutes()+":"+time.getSeconds() ;;
}, 1000);
} else {
clearInterval(timer)
timer = null;
}
}
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50" />
<br />
<input type="button" value="StopOrOpen" onclick="ooop()" />
</form>
</body>
</html>JavaScript进阶篇
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