[рони]

Зубик,

var a = [ 1,2,3,1,1,2,3,3,2], c = {};
   a.forEach(function(a) {
   c[a] ? c[a]++ : (c[a]=1)
});
 a.sort(function(a,b) {
   return c[b] - c[a] || b - a
})
alert(a)