javascript延时重复执行函数 lLoopRun.js
function lLoopRun(sFuncLoop,sFuncEnd,nDelay) {
//writen by http://fengyan.iecn.cn
//sFuncLoop >> 字符串型，需要重复执行的Javascript函数或语句（多个函数或语句请用;分隔）
//sFuncEnd >> 字符串型，用于中止重复执行动作（sFuncLoop）的Javascript函数或语句
//nDelay >> 数字型，重复执行的时间间隔（毫秒数）
var vintervalId = null;
var runString = sFuncLoop;
var stopString = sFuncEnd;
var delayTime = nDelay;
//var nCount = 0;//执行次数//为便于测试，应用时就将此行注释掉
this._doLoop = function (){
if (vintervalId && !eval(stopString)){
eval(runString);
//nCount++;//记录执行次数//为便于测试，应用时就将此行注释掉
} else {
window.clearInterval(vintervalId);
vintervalId = null;
}
//document.getElementById("TestCount").innerHTML = nCount;//输出执行次数//为便于测试，应用时就将此行注释掉
}
window.clearInterval(vintervalId);
vintervalId = window.setInterval(this._doLoop,delayTime);
}
几个实例代码：
水平往复运动:
<html>
<head>
<title>lLoopRun.js 应用实例：水平往复运动</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<meta name="Author" content="CnLei,枫岩" />
<style type="text/css">
#IECN {position:absolute;}
</style>
<script type="text/javascript" src="lLoopRun.js"></script>
</head>
<body>
<p>执行次数：<strong id="TestCount">0</strong></p>
<img id="IECN" src="http://bbs.iecn.net/attach-iecn/upload/7574.gif" style="left:0px;top:0px;" width="120" />
<script type="text/javascript">
<!--
function chgPos(sId,n){
var o = document.getElementById(sId);
o.style.left = (parseInt(o.style.left)+n)+"px";
}
function chgPosStop(sId,nMax){
var o = document.getElementById(sId);
if(parseInt(o.style.left)<0){isReBack = false;}
if(parseInt(o.style.left)>nMax){isReBack = true;}
if(isReBack) {
nNum=-Math.abs(nNum);
} else {
nNum=Math.abs(nNum);
}
}
var nNum=10;
var isReBack = false;
lLoopRun("chgPos(’IECN’,nNum);","chgPosStop(’IECN’,600)",20);
-->
</script>
</body>
</html>
自动伸缩大小:
<html>
<head>
<title>lLoopRun.js 应用实例：自动伸缩大小</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<meta name="Author" content="CnLei,枫岩" />
<script type="text/javascript" src="lLoopRun.js"></script>
</head>
<body>
<p>执行次数：<strong id="TestCount">0</strong></p>
<img id="IECN" src="http://bbs.iecn.net/attach-iecn/upload/7574.gif" style="left:0px;top:0px;" width="120" />
<script type="text/javascript">
<!--
function chgPos(sId,n){
var o = document.getElementById(sId);
o.width = (parseInt(o.width)+n);
}
function chgPosStop(sId,nMax){
var o = document.getElementById(sId);
if(parseInt(o.width)<10){isReBack = false;}
if(parseInt(o.width)>nMax){isReBack = true;}
if(isReBack) {
nNum=-Math.abs(nNum);
} else {
nNum=Math.abs(nNum);
}
//return parseInt(o.style.left)>nMax || (parseInt(o.style.top)>nMax-200);
}
var nNum=10;
var isReBack = false;
lLoopRun("chgPos(’IECN’,nNum);","chgPosStop(’IECN’,500)",20);
-->
</script>
</body>
</html>
垂直往复运动:
<html>
<head>
<title>lLoopRun.js 应用实例：垂直往复运动</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<meta name="Author" content="CnLei,枫岩" />
<style type="text/css">
#IECN {position:absolute;}
</style>
<script type="text/javascript" src="lLoopRun.js"></script>
</head>
<body>
<p>执行次数：<strong id="TestCount">0</strong></p>
<img id="IECN" src="http://bbs.iecn.net/attach-iecn/upload/7574.gif" style="left:0px;top:0px;" width="120" />
<script type="text/javascript">
<!--
function chgPos(sId,n){
var o = document.getElementById(sId);
o.style.top = (parseInt(o.style.top)+n)+"px";
}
function chgPosStop(sId,nMax){
var o = document.getElementById(sId);
if(parseInt(o.style.top)<0){isReBack = false;}
if(parseInt(o.style.top)>nMax){isReBack = true;}
if(isReBack) {
nNum=-Math.abs(nNum);
} else {
nNum=Math.abs(nNum);
}
//return parseInt(o.style.top)>nMax || (parseInt(o.style.top)>nMax-200);
}
var nNum=10;
var isReBack = false;
lLoopRun("chgPos(’IECN’,nNum);","chgPosStop(’IECN’,300)",20);
-->
</script>
</body>
</html>
渐变显示(图片):
<html>
<head>
<title>lLoopRun.js 应用实例: 渐变显示效果</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<meta name="Author" content="CnLei,枫岩" />
<style type="text/css">
body{background:#080;color:#fff;}
#IECN {
background:#fff;
filter: Alpha(opacity=10);
-moz-opacity:.10;
opacity:.10;
}
</style>
<script type="text/javascript" src="lLoopRun.js"></script>
</head>
<body>
<p>执行次数：<strong id="TestCount">0</strong></p>
<img id="IECN" src="http://bbs.iecn.net/attach-iecn/upload/7574.gif" style="left:0px;top:0px;" width="120" /><br /><br />刷新再次查看演示效果
<script type="text/javascript">
<!--
function chgOpacity(sId,n){
var o = document.getElementById(sId);
if (o.filters) {
o.filters[0].Opacity = parseInt(o.filters[0].Opacity) + n;
} else {
o.style.opacity= eval(document.defaultView.getComputedStyle(o,null).getPropertyValue(’opacity’)) + (n*100/10000);
}
}
function chgOpacityStop(sId){
var o = document.getElementById(sId);
if (o.filters) {
return parseInt(o.filters[0].Opacity)>=99;
} else {
return eval(o.style.opacity)>=0.99;
}
}
lLoopRun("chgOpacity(’IECN’,1);","chgOpacityStop(’IECN’)",20);
-->
</script>
</body>
</html>
原文：http://fengyan.iecn.cn/blog-html-do-showone-uid-35653-type-blog-itemid-2320.html
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