url - self

hello, I have three tables with similar formats but different information. So, I wrote one function to deal with all three. Problem is that originally this was done with one form, so I had an add button at the bottom (and delete beside each record). But the form took too long to load now I need to break it up. I would like to keep the function and use it across three pages...I just need to know how to get the url of the page calling the function so I can delete the information from the appropriate table. Thanks in advance. Paul