Test if file uploaded

I allow my users the option to upload an image, I then retreive the file name using
$filename1 =JRequest::getVar('image1');
How can I test if the user has uploaded an image? Thanks for any help here.

Hi ugly,

You can use the Joomla JFile class to check if the file exists.

Bob

Thank you for your answer Bob. Are uploaded files parked in their new directories by the time I test for their existence in "onsubmit"?

Hi ugly,

Yes, I think so. They are certianly in place by the time emails are sent. I think they are the first action after checking form permissions.

Bob