调试js，进来看看代码吧！解决思路 _JavaScript

调试js，进来看看代码吧！急！
朋友们你们输入我这些代码然后你们试试，这个滚动框内共8张图
连续滚动，就是第一张挨着第二张...第八章挨着第一张这样
现在是滚动框空白了，然后从头开始滚动。
各位大哥大姐帮忙看下吧。。不胜感激！！

HTML code


<div class="layout_liujiu_14 left">
           <div class="biaoti_liujiu_beijing"><span><a target="_blank" href="index.php?action=sj">
           <img width="221" height="43" title="北京攻略时尚街拍" alt="时尚工坊" src="./content/themes/default/style/image/biaoti_07.gif"></a></span>
           </div>
           <div onmouseout="ISL_StopUp()" onmouseup="ISL_StopUp()" onmousedown="ISL_GoUp()" class="LeftBotton">
           <img width="30" height="35" title="左滚动" alt="左滚动" src="./content/themes/default/style/image/jietou_left.gif">
           </div>
                  <div id="ISL_Cont" class="Cont"><!--时尚工坊-->
                      <div class="ScrCont">
                         <div id="List1">
                             <div class="pic_gg"><a href="index.php?action=pic&amp;id=1039">
<img width="163" height="217" title="北京攻略时尚街拍" alt="北京攻略时尚街拍" src="./content/attachment/2011-09-13/20110913195225xiao.jpg"></a></div>
                                                     <div class="pic_gg"><a href="index.php?action=pic&amp;id=1038">
<img width="163" height="217" title="北京攻略时尚街拍" alt="北京攻略时尚街拍" src="./content/attachment/2011-09-13/20110913194958xiao.jpg"></a></div>
                                                     <div class="pic_gg"><a href="index.php?action=pic&amp;id=1037">
<img width="163" height="217" title="北京攻略时尚街拍" alt="北京攻略时尚街拍" src="./content/attachment/2011-09-13/20110913194821xiao.jpg"></a></div>
                                                     <div class="pic_gg"><a href="index.php?action=pic&amp;id=1036">
<img width="163" height="217" title="北京攻略时尚街拍" alt="北京攻略时尚街拍" src="./content/attachment/2011-09-13/20110913194715xiao.jpg"></a></div>
                                                     <div class="pic_gg"><a href="index.php?action=pic&amp;id=1035">
<img width="163" height="217" title="北京攻略时尚街拍" alt="北京攻略时尚街拍" src="./content/attachment/2011-09-13/20110913194530xiao.jpg"></a></div>
                                                     <div class="pic_gg"><a href="index.php?action=pic&amp;id=1034">
<img width="163" height="217" title="北京攻略时尚街拍" alt="北京攻略时尚街拍" src="./content/attachment/2011-09-13/20110913194311xiao.jpg"></a></div>
                                                     <div class="pic_gg"><a href="index.php?action=pic&amp;id=1033">
<img width="163" height="217" title="北京攻略时尚街拍" alt="北京攻略时尚街拍" src="./content/attachment/2011-09-13/20110913194123xiao.jpg"></a></div>
                                                     <div class="pic_gg"><a href="index.php?action=pic&amp;id=1032">
<img width="163" height="217" title="北京攻略时尚街拍" alt="北京攻略时尚街拍" src="./content/attachment/2011-09-13/20110913193751xiao.jpg"></a></div>
                                                  </div>                         
                     </div>
                   </div>
            <div onmouseout="ISL_StopDown()" onmouseup="ISL_StopDown()" onmousedown="ISL_GoDown()" class="RightBotton">
            <img width="30" height="35" title="右滚动" alt="右滚动" src="./content/themes/default/style/image/jietou_right.gif">
            </div>
         </div>