1.js循環(huán)倒計時代碼 每5秒循環(huán)倒計時到0 再從5秒開始
<script>
var start = 5;
var step = -1;
function count()
{
document.getElementById("div1").innerHTML = start;
start += step;
if(start < 0)
start = 5;
setTimeout("count()",1000);
}
window.onload = count;
</script>
<div id="div1"></div>
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2.<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>counter</title>
<script language="javascript" type="text/JavaScript">
function Counter(nMax,nInterval)
{
this.maxTime=nMax;
this.interval=nInterval;
this.objId="timer";
this.obj=null;
this.num=this.maxTime;
this.timer=null;
this.start=function()
{
this.obj=document.getElementById(this.objId);
if(this.num>0) setTimeout(this.run,this.interval*1000);
};
this.run=function()
{
if(myCounter.num>0)
{
myCounter.num--;
myCounter.obj.innerHTML=myCounter.num;
myCounter.timer=setTimeout(myCounter.run,myCounter.interval*1000);
}
else clearTimeout(myCounter.timer);
};
this.show=function()
{
document.write("<span id="+this.objId+">"+this.num+"</span>");
this.obj=document.getElementById(this.objId);
//alert(this.obj.innerHTML);
}
}
</script>
</head>
<body onload="myCounter.start();">
<script language="JavaScript" type="text/JavaScript">
var myCounter=new Counter(10,1);
</script>
<p>現(xiàn)在剩下
<script language="JavaScript" type="text/JavaScript">
myCounter.show();
</script>
秒鐘!</p>
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3.
請等待<span id="dd">10</span>秒
<script type="text/javascript">
function run(){
var s = document.getElementById("dd");
if(s.innerHTML == 0){
window.location.href='regform.shtml';
return false;
}
s.innerHTML = s.innerHTML * 1 - 1;
}
window.setInterval("run();", 1000);
</script>
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4.
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