Sort strings and numbers.

gistfile1.js

var x = [1,3,'b',5,2,4,'a'];

x.sort(function(a,b){
    if ( typeof a === typeof b ) {
        return (a > b);
    } else {
        return typeof a > typeof b;
    }
});

// [1, 2, 3, 4, 5, "a", "b"]