AJAX and iFrame: Calling AJAX from inside the iFrame to Update an Outside DIV

I have a page where a user can up开发者_JAVA技巧load a file along with some other input. Because I wanted this to be AJAX-like, I resorted to using an iFrame to accomplish this.

After the file is uploaded and an iFrame is loaded with a response page, I need to update a DIV outside of the iFrame with an AJAX call. The reason for separate updates, is that the result of the outside DIV depends on the input that the user provided with the file input.

Can this be done? Am I approaching this the wrong way?

Thank you!

UPD: Can the returned client code from within the iFrame "see" elements outside that iFrame?

Write your code in the onload event of the page loaded into the iframe. Then top will give you the top frame or parent will give you the parent frame.

Yes , it can be done. But you can do away with,the need for an AJAX-call , to update the outside the div.

Have your, servlet(assuming you are using JSP/servlets) that accepts the mutlipart request(the servlet that accepts the upload), return the intended response (to be shown on the refreshed iFrame), and ALONG WITH IT, the necessary information from the file input. This way you have all the necessary details on the client, in one response. A simple javascript function can achieve , updating the outer div with the information from the file input.