检测用户浏览器是否支持CSS3的方法

<span id="check" rel="Detect"></span>

#check {
display: none;
width: 0;
height: 0;
}
#check[rel^="D"] {
display: block;
width: 0;
height: 0;
}

<script. type="text/javascript">
var obj = document.getElementById("check");
var file="special.css";
if (window.getComputedStyle)
var stat = window.getComputedStyle(obj,null).getPropertyValue("display");
else if (obj.currentStyle)
var stat = obj.currentStyle.display;
var css3 = (stat == "block");
if (css3) alert("CSS3 Supported.");
else alert("CSS3 not supported.");
</script>