在aspx里调用一个javascript里的函数，为什么不执行呢？高手帮我看看，谢谢了

picture.js文件：
var imgUrl=new Array(); 
var imgLink=new Array(); 
var adNum=0; 
imgUrl[1]="1.jpg"; 
imgLink[1]="http://www.******.htm"; 
imgUrl[2]="2.jpg"; 
imgLink[2]="http://www.*****.htm"; 
imgUrl[3]="3.jpg"; 
imgLink[3]="http://www.****.htm"; 
imgUrl[4]="4.jpg"; 
imgLink[4]="http://www.chuguo**********.htm"; 
var imgPre=new Array(); 
for (i=1;i<4;i++){ 
imgPre[i]=new Image(); 
imgPre[i].src=imgUrl[i]; 
} 
function setTransition(){ 
if (document.all){ 
imgUrlrotator.filters.revealTrans.Transition=Math.floor(Math.random()*20); 
imgUrlrotator.filters.revealTrans.apply(); 
} 
} function playTransition(){ 
if (document.all) 
imgUrlrotator.filters.revealTrans.play() 
} 
function nextAd(){ 
if(adNum<imgUrl.length-1)adNum++ ; 
else adNum=1; 
setTransition(); 
document.all.imgUrlrotator.src=imgUrl[adNum]; 
playTransition(); 
theTimer=setTimeout("nextAd()", 6000); 
} function jump2url(){ 
jumpUrl=imgLink[adNum]; 
jumpTarget='_blank'; 
if (jumpUrl != ''){ 
if (jumpTarget != '')window.open(jumpUrl,jumpTarget); 
else location.href=jumpUrl; 
} 
return false; 
} 
function displayStatusMsg() { 
status=imgLink[adNum]; 
document.returnValue = true; 
} 
aspx文件：
<%@ Register TagPrefix="uc1" TagName="simplenews" Src="simplenews.ascx" %>
<%@ Register TagPrefix="uc1" TagName="BulletinFirstFace" Src="BulletinFirstFace.ascx" %><%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server" >
        <meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
<script language="JavaScript" src="../Script/picture.js"></script>
    <title>新闻管理</title>    </head>
<body ><form runat=server>
    &nbsp;<table width="831" border="0" cellpadding="0" cellspacing="0">
  <!--DWLayoutTable-->
  <tr>
    <td width="260" rowspan="2" valign="top"><img src = "javascript:nextAd()"  id="imgUrlrotator" width=260 height=200 hspace="0" vspace="0" border=0 style="FILTER: revealTrans(duration=2,transition=20);" alt ="xxx"/>     </td>
    <td width="425" height="25" valign="top" background="images/index_01.gif"></td>
    <td width="146" rowspan="4" valign="top"><img src="images/index_05.jpg" width="146" height="660" /></td>
  </tr>
  <tr>
    <td height="170" valign="top"><uc1:simplenews id="Simplenews1" runat="server"></uc1:simplenews>
    </td>
  </tr>
  
  
  <tr>
    <td height="25" colspan="2" valign="top" background="images/index_09.jpg"></td>
  </tr>
  <tr>
    <td height="440" colspan="2" valign="top"><uc1:BulletinFirstFace id="BulletinFirstFace1" runat="server"></uc1:BulletinFirstFace>
    </td>
  </tr>
</table>
</form>
</body>
</html>img src那块为何显示不出来啊？