Refreshpdf is an Applescript that takes the path of a pdf file as argument 
and then opens the file in Acrobat. If the file is already open in Acrobat, 
then Acrobat is told to close and reopen the file and to go to the same 
page that was displayed in the closed file.

The Applescript can also be called from the command line by a shell script 
"refreshpdf". Refreshpdf only works on MacOS X.