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abc.css
CSS code
.class1
{
width:10px;
background-color: red;
}
HTML code
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<link rel="stylesheet" type="text/css" href="abc.css" />
<TITLE> New Document </TITLE>
<script>
window.onload=fnInit;
function fnInit(){
// ·ÃÎÊ styleSheet ÖеÄÒ»Ìõ¹æÔò, ½«Æä backgroundColor ¸ÄΪÀ¶É«¡£
var oStyleSheet=document.styleSheets[0];
var oRule=oStyleSheet.rules[0];
oRule.style.backgroundColor="#0000FF";
}
</script>
</HEAD>
<BODY>
<div class="class1">aaa</div>
</BODY>
</HTML>
(2)
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<style type="text/css">
<!--
#apDiv1 {
position:absolute;
width:399px;
height:195px;
z-index:1;
border:1px solid #000;
background-color:#CCCCCC;
}
-->
</style>
<script>
window.onload = function(){
alert(document.getElementById('apDiv1').currentStyle.width)
}
</script>
</HEAD>
<BODY>
<div id="apDiv1">aaa</div>
</BODY>
</HTML>
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e.style.border="1px solid red";   
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