setTimeout (需要执行的函数，延迟的时间ms);
比如 :
setTimeout(function(){
alert("Hello World!");
},3000);
就会在3s后输出Hello World;
setInterval(需要执行的函数，间隔的时间ms);
比如:
setInterval(function(){
alert("Welcome to my blog!");
},3000);
每3s中输出 Welcome to my blog!
通过setTimeout 也可以实现 setInterval：
function testfoo(){
alert("You are very handsome!");
setTimeout(testfoo,1000);
}
setTimeout(testfoo,1000);
回调一下
测试Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Test</title>
<script type="text/javascript">
function init(){
time = document.getElementById("timer");
setInterval(conter,1000);
}
function conter(){
time.innerHTML = time.innerHTML - 1;
if(time.innerHTML < 0){
document.location = "http://baidu.com";
}
}
</script>
</head>
<body onload="init()">
<div id="timer">10</div>
</body>
</html>