Here's some javascript to cover the page and display a message: document.body.style.overflow = "hidden";
var overlay = document.createElement("div");
overlay.style.position = "absolute";
overlay.style.top = "0px";
overlay.style.left = "0px";
overlay.style.backgroundColor = "#000";
overlay.style.color = "#FFF";
overlay.style.width = "100%";
overlay.style.height = "100%";
overlay.innerHTML = "Please wait... We're working on something here. ";
document.body.appendChild(overlay); You could make a sub that executes this javascript and call that sub after every time you navigate to a new page.