I just stumbled across this the other day when i was playing... a remote server can poll a surfers computer and determin some applications they have installed by trying a load an image with the file:// protocol. if the file is found on disk the javascript onload event fires..if not the onerror event fires.. http://geocities.com/dzzie/sys_snoop1.html you can also check out the remote system by setting an iframe src=file:// to common paths to txt or xml files..if they are found they will raise the onload event (oddly enough .html extension wont raise event) http://geocities.com/dzzie/sys_snoop2.html
