Determine and set browser full screen mode

 
//Set the browser to full screen
function f_SetFullScreen() { 
//If the browser is not full screen, set it to full screen mode
if (!f_IsFullScreen()) { 
var wsShell = new ActiveXObject('WScript.Shell'); 
wsShell.SendKeys('{F11}'); 
return false; 
} 
} 

//Determine if the browser is full screen
function f_IsFullScreen() { 
return (document.body.scrollHeight == window.screen.height && document.body.scrollWidth == window.screen.width); 
}