This article will outline how to link a POS button to fire off an external web page.
To allow users to open web pages from the POS you can use the InvokeExternalApplication on a taskpad button to open Chrome or Internet Explorer and use the startup parameters of that application to send the user to a specific web page. Below you can see an example using Internet Explorer. Also, notice that you can send some variables through the command parameter [RegisterId] being used so that when the browser is opened it will replace this ID value with the ID value for the POS station the user is clicking the button from.
'CommandPath': 'URL name',