<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>2-11</title>
<!-- 引入jQuery -->
<link rel="stylesheet" href="default.css" type="text/css" />
<script src=".jquery.js" type="text/javascript"></script>
<script type="text/javascript">
var count=0;
var a=true;
var timeID;
function init(){
timeID=setInterval(function(){getJindu("nihao");},1000);//每隔1秒執行函數getJindu
window.setTimeout('window.clearInterval(timeID)',5000); //到時間就自動停止
}
function getJindu(ch){
if(a){
document.getElementById("counter").innerHTML=count++;
}else{
alert(ch);
document.getElementById("counter").innerHTML=count;
}
}
function stopTimer(){
a=false;
}
function startTimer(){
a=true;
}
function over(){
clearInterval(timeID);
}
</script>
</head>
<body style="padding-left: 6px; padding-right: 8px;" onload="init();">
<div id="counter"></div>
<input type="button" value="start" onclick="startTimer();"/>
<input type="button" value="stop" onclick="stopTimer();"/>
<input type="button" value="over" onclick="over();"/>
</body>
</html>
實現了setInterval手動開啓和自動終止功能。
