jquery/JavaScript - Delay until upload complete -

My jQuery script looks like this (submitting file to upload form):

  
 I $ ("#"); $ ("# output"). Val (""); $ ("#") UpTar "), unless the form submission is complete ( This file is uploaded and PHP script has responded.)  
  Edit   
 #uptar is the goal of an iframe and form submission. / P> 
 Thank you!  
  The code after the solution   I want to display #uptar only when its content form from the action script Generate $ ('# UpTar'). (Function () ($ {"($ #" ("# addMore") (function () {$ ("# progForm"). Up ("", "block"); $ ("#head, #obj, #theory, #code, #output, #conc") Val ("");});}); There is no way to javascript in the browser "Waiting" for anything.    
 
 
 In this case, there are some things you can do:  
 
 
 You set the goal  & lt; CSS changes can be added to "load" event handlers for iframe & gt; ; $ ('# UpTar') load (function ($ ("$ (" # upTar "). Css (" display "," block "); $ (" #title, #obj, #theory, #code, #output, #conc "). Val (" ");}    
 
 You can enter the code from  & lt; iframe & gt;  In response to the POST form executed.  
  $ (function () {(function ($) {$ ("# (" # "," # "," # ",". $); });