var support_css3 = (function() {
var div = document.createElement('div'),
vendors = 'Ms O Moz Webkit'.split(' '),
len = vendors.length;
return function(prop) {
if ( prop in div.style ) return true;
prop = prop.replace(/^[a-z]/, function(val) {
return val.toUpperCase();
});
while(len--) {
if ( vendors[len] + prop in div.style ) {
return true;
}
}
return false;
};
})();
function support_css3_3d(){
var docElement = document.documentElement;
var support = support_css3('perspective');
var body = document.body;
if(support && 'webkitPerspective' in docElement.style){
var style = document.createElement('style');
style.type = 'text/css';
style.innerHTML = '@media (transform-3d),(-webkit-transform-3d){#css3_3d_test{left:9px;position:absolute;height:3px;}}';
body.appendChild(style);
var div = document.createElement('div');
div.id = 'css3_3d_test';
body.appendChild(div);
support = div.offsetLeft === 9 && div.offsetHeight === 3;
}
return support;
}
出处:http://www.cnblogs.com/lvdabao/p/HTML5_CSS3_detection.html