The IE7 script represents an amalgamation of disparate solutions to Explorer’s rendering problems. The solutions it provides can be summarised as follows:
CSS2/3 Selectors
Fixed Positioning
Box-Model (including min/max-width/height)
Generated Content (new)
PNG Transparency
Broken HTML Tags
<!-- compliance patch for microsoft browsers -->
<!--[if lt IE 7]>
<script src="/ie7/ie7-standard-p.js" type="text/javascript">
</script>
<![endif]-->