return from a function ajax [duplicate]

Answer 1

Ajax is asynchronous. You cannot you use a return value. You must use a callback:

ret("user", function(check) {
  if (check == true)
    .. run ..
});

And you can implement ret like this:

function ret(as, callback) {
  ....codes...
   $.ajax({
      type: "POST",
      url: "../../03",
      data: "as="+as,
      success: function (msg) {
        if(msg == 'true' ){
         ..codes..
         callback(true);
        }else{
         ..codes..
         callback(false);
        }
      } 
  });
}

Another option would be to force the request to be synchronous, but that's not really the idiomatic way of doing it.