handling input file with js + codeigniter

[eluser]e.abubakr89[/eluser]
Hi all

When I need to handle data of html form and post it to php server using ajax, I used regular ways to post values of inputs of myform after storing it in var

i.e, to handle an input text

Code:

var myval = $('#elementId').val()

but the problem is when I have an input file in my form

Code:

<input type="file" name="userfile" id="userfile"/>

How can I post the file to php server , or any way to enable php server to handle and upload the file with other input boxes without refreshing the current page (as Ajax technique is) ?!

Help please

[eluser]toopay[/eluser]
Some quickstart tutorial