export data to a file

[tmyonline]

Hi guys,

 

I need to export a web report to a CSV file.  I already know how to do it.  However, as of now, I have made it so that when someone clicks the "export" button, it will export the data to a predefined directory which may not exist on some computers (I know this way is not desirable).  Is there a way that when he clicks the export button, it will pop up a little wizard/window which will present two options - ask the user whether he wants to open the CSV file or save the file.  If he chooses save, he will be able to save it to a place of his choice ?  How should I do it ?  Thanks a lot.