<html>
<head>
<title>CSS in I.E & Firefox</title>
<style type="text/css">
div.LineClass{
color : red; /* for firefox */
@color : blue; /* for i.e. */
}
</style>
</head>
<body>
<div class="LineClass">Hello world! A simple line using style-sheet.</div>
<div style="text-decoration:underline;@text-decoration:overline;">Hello world again!</div>
</body>
</html>
note : The mark @ could be replace with other symbol like + etc.
And the style for I.E. should be placed after the style for Firefox.