IE7 loads and parses all style sheets into a form that Explorer can understand. You can then use most CSS2/CSS3 selectors without having to resort to CSS hacks.
The lightweight script is a single-line inclusion in your HTML/XML document. No alteration of your original markup is necessary. Neither do you have to alter your CSS.
IE7 provides Microsoft Internet Explorer with support for W3C standard CSS and HTML:
supports the following CSS selectors:
namespace|selector
parent > child
adjacent + sibling
adjacent ~ sibling
[attr], [attr="value"], [attr~="value"] etc
.multiple.classes (fixes bug)
:hover, :active, :focus (for all elements)
:first-child, :last-child, only-child, nth-child, nth-last-child
:check, :disabled, :enabled
:root, :empty, :contains(), :not()
:before/:after/content:
:lang()
works with both HTML and XML documents
supports imported style sheets
preserves the cascade of the style sheet
does not alter the document structure
does not repeatedly query the DOM tree using JavaScript
uses pure CSS to enforce style sheet rules
supports the W3C box model in both standards and quirks mode
supports fixed positioning (flicker free)
supports overflow:visible
supports min/max-width/height
fixes broken (X)HTML elements (abbr, object)
standardies forms behavior
supports PNG alpha transparency
lightweight script (22K)
completely modular (add/remove fixes)
works for Microsoft Internet Explorer 5+ (Windows only)