print sheet

Hello friends,

I want to put a picture on top of the print sheet. I know that I put on view "showcart.php". The problem is that the image that I put also appear on the front end of the site. I just want to appear in the printed sheet. Have got no response you should put this code below:

$tmpl = JRequest::getVar('tmpl','');
if($tmpl == 'component){ /* display the images */ }
else{ /* don't display them */ }

how I don't understand php, do not know where should I put this code.
Can you help me?

Thank you

Regards,

Nuno