Javascript检测浏览器对CSS属性的支持 /* supports */

//检测浏览器对CSS属性的支持
supports = (function() {
var  div = document.createElement('div'),
vendors = 'Khtml Ms O Moz Webkit'.split(' ');

return function(prop) {
if ( prop in div.style ) return true;

var len = vendors.length;

prop = prop.replace(/^[a-z]/, function(val) {
return val.toUpperCase();
});

while(len--) {
if ( vendors[len] + prop in div.style ) {
// browser supports box-shadow. Do what you need.
// Or use a bang (!) to test if the browser doesn't.
return true;
}
}
return false;
};
})();

supports('background');//true