Show browser dimensions

tellsize.js

/* Debug: Tell Size
===========================================================
Show browser size. Turn off on production.
*/

(function () {
    var ts = document.createElement('div');
    ts.setAttribute("id", "msg");
    ts.style.cssText = "padding:0.25em;position:fixed;bottom:0;right:0;font-size:0.75em;font-weight:bold;color:white;background:red;";
    document.body.appendChild(ts);
    function tellSize() {
        ts.innerHTML = window.innerWidth + "px x " + window.innerHeight + "px";
    }
    window.onload = tellSize;
    window.onresize = tellSize;
})();