javascript - How to delay executing of called function? -

i'm making api application, using modules. place each module in corresponding .js file, , after push .js's in page head:

app.loadmodule = function (src) {   var script = document.createelement('script');   var appendto = document.getelementsbytagname('head')[0];    script.src = app.prefs.domain + '/js/mods/' + src + '.js';   appendto.appendchild(script); };  app.printloadedmodule = function (name) {   console.log(name + '.js'); };  app.moduleloader = (function () {   var modules = app.modulestoload;   (var = 0, len = modules.length; < len; i++) {     app.loadmodule(modules[i], app.init);   } })(); 

after client can call api functions situated in modules. so, calls must executed after scripts appear in head.

i have:

 app.init = function() {    if (app.isfunc(callback)) {      callback();    }  }; 

the client calls api this:

app.init(function () {     app.api('user.get', {user_ids: '1'}, function (data) {         console.log(data);     }); }); 

the problem don't understand how delay executing client calls until app.moduleloader has finished.

thanks in advance!