Making a query search using names from filemaker db on a specific url.

I have a filemaker10 data base with 600 names (Name_First,Name_Last). i made a button in fm to launch the url. Im trying to figure out how to take it a step further so it will, press the tab key. this will let me choose the field to allow me to enter Name_First, Press the tab key to enter Name_Last, then press enter key to allow me to find their status.

so when i click the button it will go to the site. enter first name from db. last name from db. then perform search.