JavaScript - detect CSS transform 3d support and supported browser prefix

gistfile1.js

//window.onload=function(){
    var supportedPrefix,
      supports3d = false,
      prefixes = [ "Webkit", "Moz", "ms", "O" ],
      div = document.createElement("div");

    if ( div.style.perspective !== undefined ) {
        /*Browser supports CSS transform 3d without prefix*/
        supportedPrefix = "";
        supports3d = true;
    }else {
        for ( var i = 0; i < prefixes.length; ++i ) {
            if((prefixes[i] + "Perspective") in div.style) {
                supports3d = true;
                supportedPrefix = prefixes[i];
                break;
            }
        }
    }
    console.log("supports3d: " + supports3d + "; browser prefix: " + supportedPrefix);
//}