The website is findlatitudeandlongitude.com. If you go there, you see a form where you can enter an address, press a button and have the coordinates shown on the right as longitude and latitude.
In order to script this website in Filemaker, you can load it in our Form utility application (included in Plugins download). There you see there is a form named load_location with a text field "loc". Our form utility shows you the Filemaker calculation line to fill text inside: MBS( "WebView.SetFormInputValue" ; WebViewerRef; "load_location"; "loc"; Value )
Now of course we need a web viewer in Filemaker and give it a name. We use "web" in our examples as the name. So in the examples it's MBS( "WebView.SetFormInputValue" ; "web"; "load_location"; "loc";Latitude Longitude Lookup::Address ).
Well, I hope this example helps you. If you have questions, please don't hesitate to ask questions. Or simply ask us for a kick start help for your website. And don't forget that this breaks as soon as the website changes the layout.
Have fun. Here is the example project: latitudelongitudelookup.fp7.zip
PS: Same can be done in Real Studio with our htmlviewer extensions.