jquery - How do I execute function after ajax call

jquery - How do I execute function after ajax call

This problem is now solved and I no longer need help.
I have this code and am experiencing some problems
$.ajax({
url: this.html_url,
cache: false,
success: function(html){
$('body:last-child').append(html);
return true;
}
});
doSomething();
My problem is that doSomething is called before the ajax success function
has completed. I would like doSomething to be called immediately after the
ajax call is completed including the success function. Any help?