teacher safety

javascript: (function () { var elem = document.createElement('div'); var body = document.getElementsByTagName('body')[0]; body.appendChild(elem); elem.style.position = 'fixed'; elem.style.top = '0px'; elem.style.right = '0px'; elem.style.margin = '10px'; elem.style.paddingTop = '10px'; elem.style.width = '200px'; elem.style.height = '40px'; elem.style.zIndex = 10000; elem.style.opacity = 0.9; elem.style.color = 'white'; elem.style.backgroundColor = 'black'; elem.style.border = '1px solid white'; elem.style.textAlign = 'center'; elem.style.cursor = 'pointer'; elem.id = 'elem'; elem.style.display = 'block'; elem.innerText = 'Z'; }()); var safety=prompt("what tab do you want to open when a teacher comes by? click z to go to that tab. warning: may have to click out of element for it to work"); window.addEventListener("keydown",function(event){ if (event.key=="z"){ window.location.href=safety; } }); document.getElementById('elem').addEventListener('click', function() { window.location.href=safety; });