叔本华Arthur
2016-03-20 21:44
<!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(function(){
clock()
},100)
function clock2(){
clearInterval(i)
}
function clock3(){
var i=setInterval(function(){
clock()},100)
}
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50" />
<input type="button" value="Stop" onclick="clock2()" />
<input type="button" value="Continue" onclick="clock3()">
</form>
</body>
</html>
按了continue之后再按stop就无效了,该怎么改
<!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;
function clock2(){
clearInterval(i)
}
function clock3(){
i=clearInterval(i)
i=setInterval(clock,100)
}
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50" onclick="clock3()"/>
<input type="button" value="Stop" onclick="clock2()" />
<input type="button" value="Continue" onclick="clock3()">
</form>
</body>
</html>
多次摁的问题解决了 但是 上来还是不显示时间。
上面的代码有bug;就是刚开始没有显示时间,你的先摁一下Continue才能触发。还有一个bug就是你多次触发Continue 再stop 不好使 你自己改一下。
给一个全局变量。var = i;
<!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;
function clock2(){
clearInterval(i)
}
function clock3(){
i=setInterval(clock,100)
}
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50" />
<input type="button" value="Stop" onclick="clock2()" />
<input type="button" value="Continue" onclick="clock3()">
</form>
</body>
</html>
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