<html>
<head>
<script language="JavaScript">
var c1 = 0;
var c2 = 0;
var c3 = 0;
var o1 = 0;
var o2 = 0;
var o3 = 0;
ID = window.setTimeout("start();", 100);
function start() {
if (c1 == 59) {
c1 = 00;;
if (c2 == 59) {
c2 = 00;
}
else c2++;
}
else c1++;
if (c1 == 0 || c1 == 1 || c1 == 2 || c1 == 3 || c1 == 4 || c1 == 5 || c1 == 6 || c1 == 7 || c1 == 8 || c1 == 9) o1 = "0" + c1;
else o1 = c1;
if (c2 == 0 || c2 == 1 || c2 == 2 || c2 == 3 || c2 == 4 || c2 == 5 || c2 == 6 || c2 == 7 || c2 == 8 || c2 == 9) o2 = "0" + c2;
else o2 = c2;
if (c3 == 0 || c3 == 1 || c3 == 2 || c3 == 3 || c3 == 4 || c3 == 5 || c3 == 6 || c3 == 7 || c3 == 8 || c3 == 9) o3 = "0" + c3;
else o3 = c3;
document.forms[0].elements[0].value = o3 + ":" + o2 + ":" + o1;
ID = window.setTimeout("start();", 100);
}
</script>
</head>
<body>
<form name="frm1">
<input type="text" name="timer1">
<input type="button" name="but1" value="start" onClick="c1=0; c2=0; c3=0; o1=0; o2=0;
o3=0; start();">
<input type=button name="but2" value="stop" onClick="window.clearTimeout(ID);">
</form>
</body>
</html>
状态栏给出错误:对象不支持此操作。
最佳答案
您在 Internet Explorer 中收到错误，因为浏览器本身或 jsFiddle 已经在使用变量 start。在您使用它定义函数之后，由于某种原因，它变成了包含字符串“fileopen”的变量。
如果将函数 start 重命名为其他名称，它会起作用:
http://jsfiddle.net/Guffa/yqsmy/
无论如何，您应该使用间隔而不是超时:
Javascript:
var c1, c2, c3, ID = null;
startTimer();
function startTimer() {
if (ID != null) {
stopTimer();
}
c1 = 0;
c2 = 0;
c3 = 0;
ID = window.setInterval(run, 100);
}
function stopTimer() {
window.clearInterval(ID);
ID = null;
}
function run() {
c1++;
if (c1 == 60) {
c1 = 0;
c2++;
if (c2 == 60) {
c2 = 0;
}
}
var o1 = (c1 <= 9 ? "0" : "") + c1;
var o2 = (c2 <= 9 ? "0" : "") + c2;
var o3 = (c3 <= 9 ? "0" : "") + c3;
document.forms[0].elements[0].value = o3 + ":" + o2 + ":" + o1;
}
HTML:
<form name="frm1">
<input type="text" name="timer1">
<input type="button" name="but1" value="start" onclick="startTimer();">
<input type="button" name="but2" value="stop" onclick="stopTimer();">
</form>
演示:http://jsfiddle.net/Guffa/B4a54/7/
如果你希望计时器准确，你应该将开始时间保存在一个变量中，然后用当前时间减去该时间来得到耗时，并且只使用间隔来显示耗时。
关于javascript - HTML/JavaScript : Timer/Stopwatch doesn't reset (after stop)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10267117/