Hi.  I'm trying to apply a fade effect with the following code, but I
keep getting the error in the subject line.  Help is appreciated.
Thanks!

Here's the code:

[CODE]
<script type="text/javascript" src="~/scriptaculous/lib/
prototype.js"></script>
<script type="text/javascript" src="~/scriptaculous/src/effects.js"></
script>
<script type="text/javascript">
        var mainImgNum = 1;

 function rotateDisplay()
 {
        if(mainImgNum == 1)
        {
                mainImgNum = 2;
        }
        else if(mainImgNum == 2)
        {
                mainImgNum = 3;
        }
        else
        {
                mainImgNum = 1;
        }



        new Effect.Fade('col', { queue: { position:'end', scope:'fader'},
                afterFinish: function()
                {
                        $('col').src = 'images/billboard_'+mainImgNum+'.gif';
                        Element.removeClassName('btn1','btnBottomCMS');
                        Element.removeClassName('btn2','btnBottomCMS');
                        Element.removeClassName('btn3','btnBottomCMS');
                        new Effect.Appear('col', {queue: {position:
'end',scope:'fader'} });
                        
Element.addClassName('btn'+mainImgNum,'btnBottomCMS_active');

                }});

 }

 function showGraph()
 {
        var val = Math.floor(Math.random()*3);

        if(val == 0)
        {
     document.write("<h3 class=\"network_reach\"><span>Network Reach</
span></h3>    <div><img src=\"images/nr_graph.png\" /></div>    <p>We
have maintained the largest online reach for 31 consecutive months -
currently reaching over <strong>85% of the Internet universe</strong>,
according to comScore Media Metrix, December 2006.</p>");
        }
        else if(val == 2)
        {
     document.write("<h3 class=\"top_advertisers\"><span>Top
Advertisers</span></h3>    <div><img src=\"images/nr_graph.png\" /></
div> <p>We have worked with <br/><strong>9 out of the top 10</strong>
online advertisers, according to Ad Age.</p>");
        }
        else
        {
     document.write("<h3 class=\"top_agencies\"><span>Top Agencies</
span></h3>    <div><img src=\"images/nr_graph.png\" /></div>    <p>We
have worked with <br/><strong>16 out of the top 20 agencies</strong>,
according to Ad Age.</p>");
        }
 }

  onload = function()
 {
  //externalLinks();
  var interval_name = setInterval(rotateDisplay, 6000);
 }
 </script>

<div  id="home">
  <div class="left_col">
    <div class="col">
    <asp:LinkButton id="btn1" PostBackUrl="~/LearnMore.aspx?
section=goverview" text="<%$ Resources:DefaultMasterResources,
GuaranteedCPMsHeader %>"
            CssClass="btnBottomCMS" Width="180px" runat="server" Font-
Size="smaller" />
      <p><asp:Label ID="lblGuaranteed" Text="<%$
Resources:DefaultMasterResources, GuaranteedCPMs %>" runat="server" /
></p>
    </div>
    <div class="col">
    <asp:LinkButton id="btn2" PostBackUrl="~/LearnMore.aspx?
section=invcontrol" text="<%$ Resources:DefaultMasterResources,
InventoryControlHeader %>"
            CssClass="btnBottomCMS" Width="180px" runat="server" Font-
Size="smaller" />
      <p><asp:Label ID="lblInventory" Text="<%$
Resources:DefaultMasterResources, InventoryControl %>" runat="server" /
></p>
    </div>
    <div class="col last_col">
    <asp:LinkButton id="btn3" PostBackUrl="~/LearnMore.aspx?
section=qadv" text="<%$ Resources:DefaultMasterResources,
QualityAdvertisersHeader %>"
            CssClass="btnBottomCMS" Width="180px" runat="server" Font-
Size="smaller" />
      <p><asp:Label ID="lblQuality" Text="<%$
Resources:DefaultMasterResources, QualityAdvertisers %>"
runat="server" /></p>
    </div>
  </div>
  <div class="right_col">
        <script type="text/javascript">showGraph();</script>
  </div>
</div>
[/CODE]


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