CI and Ajax

[eluser]Ajaxian64[/eluser]
Hello,
I've some problems with CI and Ajax.
I've a controller in which i've 2 methods:

function getInfo() {
search something in database
return the data
}
function whoiswho() {
get some data and transmit them to the view
$this->load->view('layouts/splash_layout',$data);
}
In the view I'm calling, there is a $path = base_url() ;
In my Layout, I've an Html block in which I call the view "$this->load->view();"
-----
when I make an ajax call to the first method (getInfo) I get the result and everything is fine. I have my data displayed in the layout block
BUT when I make an ajax call to the whosiswho method CI tells me that "Fatal error: Call to undefined function base_url() "
I guess that perhaps I bypass CI by making this ajax call and it doesn't recognize base_url().
But I'm unable to understand how to make this stuff working.
May you help me ?

[eluser]Ajaxian64[/eluser]
I've solved My Problem with :

function whoiswho() {
$data are computed;
if (IS_AJAX) {
$this->load->view('home',$data);
}
else {
$this->load->view('layouts/splash_layout',$data); // In the layout I launch the view
}
}
I transmit the view instead of layout
Also in my Ajax request I launched the file home.php (the view) by specifying the real path system/application etc ...
That's completly wrong. I must specify the http://mywebsite.com/mycontroller/whoiswho to achieve the work.
Now it works fine.
Hope this description would help someone.

[eluser]macfamous[/eluser]
yeaah that's great solution .. thanks for this .. i've got little bit same problem