重置JavaScript计数器？ [英] Reset JavaScript Counter?

问题描述

我正在尝试通过JavaScript将计数器编入网站，并在此处找到了我需要的内容：
http://www.w3schools.com/js/js_timing.asp

I am trying to program a counter into a website via JavaScript and have found exactly what I need here: http://www.w3schools.com/js/js_timing.asp

我要做的是倒数从30一旦计数器达到零，我想显示一个警告。我能够让这个工作。我唯一无法弄清楚的功能是如何在某个按钮按下时将计数器重置回30。我已经尝试了诸如 document.gameForm.txt.value = 30; 之类的代码，但无论出于何种原因，30都不会替换当前框中的任何文本。

What I am trying to do is count down from 30 to 0. Once the counter reaches zero I want to display an alert. I have been able to get this to work. The only function that I cannot figure out is how to reset my counter back to 30 on a certain button push. I have tried code such as document.gameForm.txt.value=30; but for whatever reason 30 does not replace whatever text is currently in the box.

推荐答案

据我了解，你需要打电话给 clearTimeout（） 重置计数器的功能例如：

As far as I understand it, you need to call clearTimeout() function to reset the counter eg:

var t = setTimeout("alert('I am displayed after 3 seconds!')", 3000);

稍后您可以将其重置为：

Later you can reset it like:

clearTimeout(t);

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