[webkit-help] Help with feature set

[Jeffry Killen]

I am working on getting acquainted with css3/html5/javascript/canvas/ 
webGL.

I have noticed that running a script that detects what version of  
requestAnimationFrame
the requesting client is using, that defaults to setTImeout, the  
Safari versions I am using
does not seem to recognize any version of requestAnimationFrame:

var src = '' var strSrc = '';
var alt = function()
{
            if(window.requestAnimationFrame)
             {
              src = window.requestAnimationFrame;
             strSrc = 'requestAnimationFrame'; return src;
              }
      if(window.webkitRequestAnimationFrame)
         {
          src = window.webkitRequestAnimationFrame; // Safari Version  
5.1.8 (6534.58.2)
          strSrc = 'webkitRequestAnimationFrame';
          return src;
         }
       if(window.mozRequestAnimationFrame)
         {
          src = window.mozRequestAnimationFrame;
          strSrc = 'mozRequestAnimationFrame';
          return src;
         }
       if(window.oRequestAnimationFrame)
         {
          src = window.oRequestAnimationFrame;
          strSrc = 'oRequestAnimationFrame';
          return src;
         }
       if(window.msRequestAnimationFrame)
         {
          src = window.msRequestAnimationFrame;
          strSrc = 'msRequestAnimationFrame';
          return src;
         }
       else
         {
          strSrc = 'setTimeout';
          return function(callBack)
             {
              window.setTimeout(callBack, 1000/60);
             }
         }
      }
window.onload = function() {  window.requestAnimFrame =  
alt();          if(window.requestAnimFrame) { alert(strSrc) } // alert  
-> for Safari 'setTimeout'

In Safari I get the alert string 'setTimeout' instead of  
'webkitRequestAnimationFrame'. I am using two different versions of  
Safari on Mac OSX. I don't see any misspellings here. Has Safari  
discontinued this function? Or, am I doing something wrong? Thanks for  
time and attention.

There is also missing the -webkit-gradient
How can I determine the actual feature set, and the correct syntax for  
any particular version of Safari (or Chrome, for that matter?)
Thanks for time and attention
Frustrated