What is the function to close a popup window?

[NMWater]

I have a popup that works perfectly fine. Whenever I switch layers though, the popup still hangs around along with its outline. How does one close it, say by clicking a button? I tried adding the function "map.infoWindow.hide();" to my code but that doesn't seem to be working. I set my infowindow in the map to popup. Any help would be greatly appreciated!

[NMWater]

Thanks very much! It was a simple placement of code, making a global variable worked.

Thanks!

[AnudeepGorantla]

map.infoWindow.hide();

[RobertScheitlin__GISP]

Yep that was answered three years ago.