Similar to this question, but in my case I am the web developer. How can I get the browser to ask the user again if they want to allow geolocation? I was hoping I could put some text in the page, something like, "This page's features are only available when geolocation services are active, but you have denied them for this site. Click here to try again."
I know how to change the browser to accept this, but how do I help the visitors to the page from any browser to simply turn it on at the click of a button.