我试图让以下javascript计时器执行两个功能,只需单击一个按钮 - 单击一次计时器启动; 再次点击; 它停了 再次点击它再次启动,依此类推.我在这里做错了什么？非常感谢你提前.
<html>
<head>
<script type="text/javascript">
var c=0;
var t;
var timer_is_on=0;
function timedCount()
{
document.getElementById('txt').value=c;
c=c+1;
t=setTimeout("timedCount()",1000);
}
function doTimer()
{
if (!timer_is_on)
{
timer_is_on=1;
timedCount();
}
}
function stopCount()
{
clearTimeout(t);
timer_is_on=0;
}
function both(){
doTimer();
stopCount();
}
</script>
</head>
<body>
<form>
<input type="button" value="Start count!" onclick="doTimer" />
<input type="text" id="txt" />
<input type="button" value="Stop count!" onclick="stopCount()" />
</form>
<p>
Click on the "Start count!" button above to start the timer. The input field …javascript ×1