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:
lLoopRun.js 应用实例：水平往复运动
<script></script>
执行次数：0
![javascript延时重复执行函数 lLoopRun.js_javascript技巧]()
<script>
<br><!--
<br>function chgPos(sId,n){
<br> var o = document.getElementById(sId);
<br> o.style.left = (parseInt(o.style.left)+n)+"px";
<br>}
<br><br>function chgPosStop(sId,nMax){
<br> var o = document.getElementById(sId);
<br> if(parseInt(o.style.left)<0){isReBack = false;}
<br> if(parseInt(o.style.left)>nMax){isReBack = true;}
<br> if(isReBack) {
<br> nNum=-Math.abs(nNum);
<br> } else {
<br> nNum=Math.abs(nNum);
<br> }
<br>}
<br><br>var nNum=10;
<br>var isReBack = false;
<br>lLoopRun("chgPos(’IECN’,nNum);","chgPosStop(’IECN’,600)",20);
<br>-->
<br></script>
自动伸缩大小:
lLoopRun.js 应用实例：自动伸缩大小
<script></script>
执行次数：0
![javascript延时重复执行函数 lLoopRun.js_javascript技巧]()
<script>
<br><!--
<br><br>function chgPos(sId,n){
<br> var o = document.getElementById(sId);
<br> o.width = (parseInt(o.width)+n);
<br>}
<br><br>function chgPosStop(sId,nMax){
<br> var o = document.getElementById(sId);
<br> if(parseInt(o.width)<10){isReBack = false;}
<br> if(parseInt(o.width)>nMax){isReBack = true;}
<br> if(isReBack) {
<br> nNum=-Math.abs(nNum);
<br> } else {
<br> nNum=Math.abs(nNum);
<br> }
<br> //return parseInt(o.style.left)>nMax || (parseInt(o.style.top)>nMax-200);
<br>}
<br><br>var nNum=10;
<br>var isReBack = false;
<br>lLoopRun("chgPos(’IECN’,nNum);","chgPosStop(’IECN’,500)",20);
<br>-->
<br></script>
垂直往复运动:
lLoopRun.js 应用实例：垂直往复运动
<script></script>
执行次数：0
![javascript延时重复执行函数 lLoopRun.js_javascript技巧]()
<script>
<br><!--
<br>function chgPos(sId,n){
<br> var o = document.getElementById(sId);
<br> o.style.top = (parseInt(o.style.top)+n)+"px";
<br>}
<br><br>function chgPosStop(sId,nMax){
<br> var o = document.getElementById(sId);
<br> if(parseInt(o.style.top)<0){isReBack = false;}
<br> if(parseInt(o.style.top)>nMax){isReBack = true;}
<br> if(isReBack) {
<br> nNum=-Math.abs(nNum);
<br> } else {
<br> nNum=Math.abs(nNum);
<br> }
<br> //return parseInt(o.style.top)>nMax || (parseInt(o.style.top)>nMax-200);
<br>}
<br><br>var nNum=10;
<br>var isReBack = false;
<br>lLoopRun("chgPos(’IECN’,nNum);","chgPosStop(’IECN’,300)",20);
<br>-->
<br></script>
渐变显示(图片):
lLoopRun.js 应用实例: 渐变显示效果
<script></script>
执行次数：0
![javascript延时重复执行函数 lLoopRun.js_javascript技巧]()
刷新再次查看演示效果
<script>
<br><!--
<br>function chgOpacity(sId,n){
<br> var o = document.getElementById(sId);
<br> if (o.filters) {
<br> o.filters[0].Opacity = parseInt(o.filters[0].Opacity) + n;
<br> } else {
<br> o.style.opacity= eval(document.defaultView.getComputedStyle(o,null).getPropertyValue(’opacity’)) + (n*100/10000);
<br> }
<br>}
<br><br>function chgOpacityStop(sId){
<br> var o = document.getElementById(sId);
<br> if (o.filters) {
<br> return parseInt(o.filters[0].Opacity)>=99;
<br> } else {
<br> return eval(o.style.opacity)>=0.99;
<br> }
<br>}
<br><br>lLoopRun("chgOpacity(’IECN’,1);","chgOpacityStop(’IECN’)",20);
<br>-->
<br></script>
原文：http://fengyan.iecn.cn/blog-html-do-showone-uid-35653-type-blog-itemid-2320.html
