Pop Up Window

Is there a way to initiate a pop up window containing a form using PHP code? I am trying to use Javascript to popup a window which contains a form. The form is processed via a PHP script. (miniquote.scp.php3) The popup window displays OK. The form processes OK in IE 5.0 however using NS 4.7 I receive this error: "Warning there is a possible security hazard here...opeing miniquote.scp.php3 using php.exe" "When you download a file from the network, you should be aware of security considerations" "A file that contains malicious programming instructions could damage...."You should only use files obtained from a site that you trust" The issue is with Javascript as I can use the same code in a html window with no errors. Any ideas on how to get around this error would be appreciated!