Ti posto html e css anche se inrealtà dovresti il controllo ascx che viene richiamto perchè li lui richiama le varie classi sulla tabella.... comuqnue se già così riesci a capire qualcosa...
Grazie
<script type="text/javascript">
//<![CDATA[
var theForm = document.forms['aspnetForm'];
if (!theForm) {
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}
function __doPostBack(eventTarget, eventArgument) {
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theForm.__EVENTARGUMENT.value = eventArgument;
theForm.submit();
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</script>
<script src="/usercontrols/GridControls/Scripts/CollapsableGridViewJScript.js" type="text/javascript"></script>
<link href="/css/BP.Umb.UserControls.css" rel="stylesheet" type="text/css" />
<div>
<table class="UCGV_Table" cellspacing="0" rules="all" border="1" id="ctl00_ctl00_ctl00_ContentPlaceHolderDefault_MasterTemplateContentPlaceHolder_UmbracoCollapsableGridView_17_GridViewUCGV" style="border-collapse:collapse;">
<tr class="UCGV_Header">
<th class="UCGV_HeaderHidden" scope="col"> </th><th class="UCGV_HeaderExpand" scope="col"> </th><th scope="col"><a href="javascript:__doPostBack('ctl00$','Sort$data')">data</a></th><th scope="col"><a href="javascript:__doPostBack('ctl00$','Sort$tipo')">tipo</a></th><th scope="col"><a href="javascript:__doPostBack('ctl00$','Sort$oggetto')">oggetto</a></th><th scope="col"><a href="javascript:__doPostBack('ctl00$','Sort$num')">num</a></th><th scope="col"><a href="javascript:__doPostBack('ctl00$','Sort$descr')">descr</a></th><th scope="col"><a href="javascript:__doPostBack('ctl00$','Sort$allegato')">allegato</a></th>
</tr><tr class="UCGV_Row">
<td class="UCGV_ColumnHidden">
</td>
<td colspan="100%">
<div id="div1" class="UCGV_Detail" style="display: none; position: relative;">
<a href="javascript:switchViews('div1', 'one');">
<img id="img2div1" alt="Click to show/hide details" border="0"
src="/usercontrols/GridControls/Images/expand_button_white.jpg" />
</a>
<div style="position: relative; left: 25px;">
<span id="ctl00_ctl00_ctl00_ContentPlaceHolderDefault_MasterTemplateContentPlaceHolder_UmbracoCollapsableGridView_17_GridViewUCGV_ctl02_DetailsLabel" style="display:inline-block;width:100%;"><dl><dt>data</dt><dd>12/12/2012 0.00.00</dd><dt>tipo</dt><dd>prova</dd><dt>oggetto</dt><dd>prova</dd><dt>num</dt><dd>1 </dd><dt>descr</dt><dd>provaprovaprova</dd><dt>allegato</dt><dd>prova.pdf</dd></dl></span>
</div>
</div>
</td>
</tr>
<tr >
<td class="UCGV_ColumnHidden" >
</td><td>
<a href="javascript:switchViews('div1', 'one');">
<img id="imgdiv1" alt="Clica per aprire/nascondere dettagli" border="0"
src="/usercontrols/GridControls/Images/expand_button_white.jpg" />
</a>
</td><td>12/12/2012 0.00.00</td><td>prova</td><td>prova</td><td>1 </td><td>provaprovaprova</td><td>prova.pdf</td>
</tr><tr class="UCGV_RowAlt">
<td class="UCGV_ColumnHidden">
</td>
<td colspan="100%">
<div id="div2" class="UCGV_Detail" style="display: none; position: relative;">
<a href="javascript:switchViews('div2', 'one');">
<img id="img2div2" alt="Click to show/hide details" border="0"
src="/usercontrols/GridControls/Images/expand_button_white.jpg" />
</a>
<div style="position: relative; left: 25px;">
<span id="ctl00_ctl00_ctl00_ContentPlaceHolderDefault_MasterTemplateContentPlaceHolder_UmbracoCollapsableGridView_17_GridViewUCGV_ctl03_DetailsLabel" style="display:inline-block;width:100%;"><dl><dt>data</dt><dd>13/12/2013 0.00.00</dd><dt>tipo</dt><dd>prova</dd><dt>oggetto</dt><dd>prova</dd><dt>num</dt><dd>1 </dd><dt>descr</dt><dd>prova</dd><dt>allegato</dt><dd>prova</dd></dl></span>
</div>
</div>
</td>
</tr>
<tr >
<td class="UCGV_ColumnHidden" >
</td><td>
<a href="javascript:switchViews('div2', 'alt');">
<img id="imgdiv2" alt="Clica per aprire/nascondere dettagli" border="0"
src="/usercontrols/GridControls/Images/expand_button_white_alt.jpg" />
</a>
</td><td>13/12/2013 0.00.00</td><td>prova</td><td>prova</td><td>1 </td><td>prova</td><td>prova</td>
</tr>
</table>
</div>
</form>
------------------------------------------------------------
Css
td {
/*min-width: 80px;*/
padding: 5px 10px;
border: none !important;
padding: 3px;
border-bottom: 1px solid #f0f0f0;
list-style: none;
background-color: #fff;
}
tr {
padding: 5px 10px;
border: none !important;
border-color: #FFF;
}
th {
font: bold 1.1em/120% Verdana, Arial, Helvetica, sans-serif;
/* min-width: 120px; */
padding: 5px 10px;
font-variant: small-caps;
background-color: #F6DDDF;
padding: 3px;
border: none !important;
}
dl {
border: 3px solid #ccc;
padding: 0.5em;
width: 90%;
}
dt {
float: left;
/*clear: left;*/
width: 120px;
text-align: right;
font-weight: bold;
}
dt:after {
content: ":";
}
dd {
margin: 0 0 0 130px;
padding: 0 0 1em 0;
}
.UCGV_Table {
width: 100%;
border: #A50519 1px solid;
border-collapse: collapse;
color: # ;
background-color: #fff;
}
.UCGV_Header {
background-color: #F6DDDF;
color: #822433;
border: none;
font-weight: bold;
text-transform: capitalize;
}
.UCGV_ColumnHidden {
background-color: #F6DDDF;
width: 1px;
max-width: 1px;
visibility: hidden;
border: #FFF;
}
.UCGV_HeaderHidden {
background-color: #F6DDDF;
width: 0px;
max-width: 0px;
visibility: hidden;
border: #FFF;
}