Firefox、Opera、WebKitで確認。けっこう楽しい。 javascript:(function(){ var canvas = document.createElement("canvas"); canvas.width = Math.max(document.documentElement.scrollWidth, window.innerWidth); canvas.height = Math.max(document.documentElement.scrollHeight, window.innerHeight); canvas.style.position = "absolute"; canvas.style.top = "0"; canvas.style.left = "0"; canvas.style.zIndex = "9999"; document.body.
