how to get back to my webpage without using mouse and key board

Dear All,

i have a touchscreen.i have a homepage having many link buttons, i click on a link button google.com  or any other website,google.com will open(in F11 fullscreen mode) .there is any way to get back to homepage in touchscreen because i  will not use the mouse and keyboard(or any button that will always on the screen)

vb.net