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