我有一个计时器,它有一个暂停/恢复按钮,但每当我点击暂停按钮时,它就会杀死脚本而我无法恢复时间。
还有一种方法可以在时间到期后让它说出回应吗?我有另一个计时器计数,当时间用完,它显示它已经过了多长时间,但有没有办法我可以有另一个文本字段,以便我可以在页面上的不同位置找到它?
HTML ..
<script type="text/javascript">
timer = new Countdown();
timer.init();
</script>
<select id="period" onchange="start()">
<option value="0">Select time required</option>
<option value="30">30 Seconds</option>
<option value="60">1 Minute</option>
<option value="120">2 Minutes</option>
<option value="300">5 Minutes</option>
<option value="900">15 minutes</option>
<option value="1800">30 minutes</option>
<option value="2700">45 minutes</option>
<option value="3600">60 minutes</option>
</select> <span id="countdown" style="font-weight: bold;"></span>
<br>
<br>
<input type="button" value="Pause" onclick="stopwatch(this);" />
的Javascript
<script>
var timeInSecs;
var ticker;
var start_time;
function Countdown(start) {
this.start_time = start === undefined ? "1:00" : start ;
this.target_id = "#timer";
this.name = "timer";
start_time = this.start_time;
}
Countdown.prototype.init = function () {
this.reset();
ticker = setInterval(this.name + '.tick()', 1000);
}
Countdown.prototype.reset = function () {
time = this.start_time.split(":");
this.minutes = parseInt(time[0]);
this.seconds = parseInt(time[1]);
this.update_target();
}
Countdown.prototype.tick = function () {
if (this.seconds > 0 || this.minutes > 0) {
if (this.seconds == 0) {
this.minutes = this.minutes - 1;
this.seconds = 59
} else {
this.seconds = this.seconds - 1;
}
}
this.update_target()
}
Countdown.prototype.update_target = function () {
seconds = this.seconds;
if (seconds < 10) seconds = "0" + seconds;
$(this.target_id).val(this.minutes + ":" + seconds)
}
var timer = new Countdown();
timer.init();
function start() {
var s = document.getElementById("period").value;
document.getElementById("period").disabled = true;
startTimer(s);
}
function startTimer(secs) {
timeInSecs = parseInt(secs);
document.getElementById("countdown").style.color = "black";
clearInterval(ticker);
ticker = setInterval("tick()", 1000);
tick(); // to start counter display right away
}
function tick() {
var secs = timeInSecs;
if (secs > 0) {
timeInSecs--;
showTime(secs);
} else {
timeInSecs--;
document.getElementById("countdown").style.color = "red";
document.getElementById("countdown").innerHTML = "You have exceeded your time by " + (hhmmss(Math.abs(timeInSecs)));
document.getElementById("period").disabled = false;
}
}
function showTime(secs) {
var hours = Math.floor(secs / 3600);
secs %= 3600;
var mins = Math.floor(secs / 60);
secs %= 60;
var result = ((hours < 10) ? "0" : "") + hours + ":" + ((mins < 10) ? "0" : "") + mins + ":" + ((secs < 10) ? "0" : "") + secs;
document.getElementById("countdown").innerHTML = result;
}
function stopwatch(btn) {
if (btn.value == "Pause") {
clearInterval(ticker);
btn.value = "Resume";
} else {
btn.value = "Pause"
var timer = new Countdown($('#timer').val());
timer.init();
}
}
function hhmmss(secs) {
var hrs = Math.floor(secs / 3600);
var mns = Math.floor(secs / 60) % 60;
secs = secs % 60;
if (hrs < 10) hrs = "0" + hrs;
if (mns < 10) mns = "0" + mns;
if (secs < 10) secs = "0" + secs;
return mns + " minutes " + secs + " seconds";
}
</script>