In Visual Studio 2013, CSS files that are included in your project/solution will now automatically be parsed and all HTML documents will gain CSS class intellisense.
But:
ASPX and other WebForm files using the legacy editor do not benefit from this implementation in VS 2013, but may adopt the new system in future releases.
But you can still use this feature as follows:
.superscript { font-size: xx-small; vertical-align:top;}
<sup class="superscript">SM</sup>
This technique works by pushing the text down inside the header with a rather large line-height (it must be at least twice the height). Then the overflow: hidden hides the text since it’s overflowing. Source
<style type="text/css">
.ccbnRequired
{
width: 13px;
height: 15px;
background-image:url("/images/skins/white/forms/form_required.gif");
background-repeat:no-repeat;
overflow: hidden;
line-height: 500px;
}
</style>
This will force your table cellPadding and cellSpacing properties to 0 in Firefox, IE6, IE7, IE8.
table
{
border-collapse: collapse;
*border-collapse: expression('separate', cellSpacing = '0px'); /* IE hack */
}
Derek Reynolds - Brain Dump-O-Matic 