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>