自动滚动图片JS滚着滚着就没了

自动滚动图片JS滚着滚着就没有了
以下是全部的代码,有没有哪位朋友帮忙分析一下是哪里问题呢.

CSS code

<style type="text/css"><!--#RBottom_Main{    width:736px;    height:160px;    overflow:hidden;}.BMLeftArr1{    float:left;    width:12px;    cursor: pointer;    height:160px;    margin:0px;    line-height:160px;}.BMISL_Cont{    float:left;    width:712px;    height:160px;    margin:0px;    overflow: hidden;}.pic{    float:left;    text-align:center;    margin:0px;    padding:0px;    width:356px;    height:160px;}.BMRightArr1{    float:left;    width:12px;    cursor: pointer;    height:160px;    line-height:160px;}.ScrCont{width:10000000px;}.#List1,#List2{float:left;}--></style>

HTML code

 <div id="RBottom_Main">      <div class="BMLeftArr1" onmousedown="ISL_GoUp()" onmouseup="ISL_StopUp()" onmouseout="ISL_StopUp()">&lt;</div>      <div class="BMISL_Cont" id="ISL_Cont">      <div class="ScrCont">      <!-- 图片列表 begin -->      <div id="List1">      <div class="pic" style="background-color:#0000FF"></div>      <div class="pic" style="background-color:#00FFFF"></div>      <div class="pic" style="background-color:#000000"></div>      </div>      <!-- 图片列表 end -->      <div id="List2"></div>      </div>      </div>      <div class="BMRightArr1" onmousedown="ISL_GoDown()" onmouseup="ISL_StopDown()" onmouseout="ISL_StopDown()">&gt;</div>      </div></div>

JScript code

<script language="javascript" type="text/javascript"><!--//--><![CDATA[//><!--//图片滚动列表 5icool.orgvar Speed = 1; //速度(毫秒)var Space = 5; //每次移动(px)var PageWidth = 356; //翻页宽度var fill = 0; //整体移位var MoveLock = false;var MoveTimeObj;var Comp = 0;var AutoPlayObj = null;GetObj("List2").innerHTML = GetObj("List1").innerHTML;GetObj('ISL_Cont').scrollLeft = fill;GetObj("ISL_Cont").onmouseover = function(){clearInterval(AutoPlayObj);}GetObj("ISL_Cont").onmouseout = function(){AutoPlay();}AutoPlay();function GetObj(objName){if(document.getElementById){return eval('document.getElementById("'+objName+'")')}else{return eval('document.all.'+objName)}}function AutoPlay(){ //自动滚动clearInterval(AutoPlayObj);AutoPlayObj = setInterval('ISL_GoDown();ISL_StopDown();',3000); //间隔时间}function ISL_GoUp(){ //上翻开始 if(MoveLock) return; clearInterval(AutoPlayObj); MoveLock = true; MoveTimeObj = setInterval('ISL_ScrUp();',Speed);}function ISL_StopUp(){ //上翻停止 clearInterval(MoveTimeObj); if(GetObj('ISL_Cont').scrollLeft % PageWidth - fill != 0){  Comp = fill - (GetObj('ISL_Cont').scrollLeft % PageWidth);  CompScr(); }else{  MoveLock = false; } AutoPlay();}function ISL_ScrUp(){ //上翻动作 if(GetObj('ISL_Cont').scrollLeft <= 0){GetObj('ISL_Cont').scrollLeft = GetObj('ISL_Cont').scrollLeft + GetObj('List1').offsetWidth} GetObj('ISL_Cont').scrollLeft -= Space ;}function ISL_GoDown(){ //下翻 clearInterval(MoveTimeObj); if(MoveLock) return; clearInterval(AutoPlayObj); MoveLock = true; ISL_ScrDown(); MoveTimeObj = setInterval('ISL_ScrDown()',Speed);}function ISL_StopDown(){ //下翻停止 clearInterval(MoveTimeObj); if(GetObj('ISL_Cont').scrollLeft % PageWidth - fill != 0 ){  Comp = PageWidth - GetObj('ISL_Cont').scrollLeft % PageWidth + fill;  CompScr(); }else{  MoveLock = false; } AutoPlay();}function ISL_ScrDown(){ //下翻动作 if(GetObj('ISL_Cont').scrollLeft >= GetObj('List1').scrollWidth){GetObj('ISL_Cont').scrollLeft = GetObj('ISL_Cont').scrollLeft - GetObj('List1').scrollWidth;} GetObj('ISL_Cont').scrollLeft += Space ;}function CompScr(){ var num; if(Comp == 0){MoveLock = false;return;} if(Comp < 0){ //上翻  if(Comp < -Space){   Comp += Space;   num = Space;  }else{   num = -Comp;   Comp = 0;  }  GetObj('ISL_Cont').scrollLeft -= num;  setTimeout('CompScr()',Speed); }else{ //下翻  if(Comp > Space){   Comp -= Space;   num = Space;  }else{   num = Comp;   Comp = 0;  }  GetObj('ISL_Cont').scrollLeft += num;  setTimeout('CompScr()',Speed); }}//--><!]]></script> 
 

CSS code

#RBottom_Main{width:704px;overflow:hidden;padding:12px 0 5px 6px;margin:0 auto;} .BMLeftArr1{height:52px;width:19px;background:url(button.gif) no-repeat 11px 0;overflow:hidden;float:left;display:inline;margin:25px 0 0 0;cursor:pointer;} .BMRightArr1{height:52px;width:20px;background:url(button.gif) no-repeat -8px 0;overflow:hidden;float:left;display:inline;margin:25px 0 0 0;cursor:pointer;} .BMISL_Cont{width:327px;overflow:hidden;float:left;} .ScrCont{width:10000000px;} .BMISL_Cont .pic{width:132px;float:left;text-align:center;} .BMISL_Cont .pic img{padding:4px;background:#fff;border:1px solid #ccc;display:block;margin:0 auto;} .BMISL_Cont .pic p{line-height:26px;color:#505050;} .BMISL_Cont a:link,.rollBox .Cont a:visited{color:#626466;text-decoration:none;} .BMISL_Cont a:hover{color:#f00;text-decoration:underline;} #List1,.rollBox #List2{float:left;}