I have some code I use in ASP to freeze a tables header row.  Works
good in ASP.  But if I do the same in a .NET 2.0 page, the result is
different -- the header column is show in its entirety instead of
being cut-off by the width of the DIV it's in.  You can see my sample
code below... any idea why it's behaving differently ?

<div style="background-color:offwhite;overflow:auto; width: 100%;
height: 400px;border-left: 1px gray solid; border-top: 1px lightgrey
solid; padding:0px; margin: 0px">
   <center style="font-size: 10px; font-family: Arial">

       <table id="tblClients" border="0">
    <tr
style="position:relative;top:expression(this.offsetParent.scrollTop);">
        <th>ComputerName</th><th>SIMSVersion</th><th>OSUpTimeInHours</
th><th>ClientUpTimeInHours</th><th>ClientStartTime</th><th>LastUpdate</
th><th>LastMemUsage</th><th>ClientHealth</th><th>ClientHealthDetail</
th><th>LastFullScanRequestDate</th><th>LastFullScanSent</
th><th>LastFullScanLoad</th><th>FileCount</th><th>IsLoadInProcess</
th><th>ClientGUID</th>
    </tr>
</table></center>
   </div>