script.js

// ==UserScript==
// @name           damnfullscreen
// @namespace      http://x7c1.hatenablog.com/damnfullscreen
// @include        http://*.hatenablog.com/*
// ==/UserScript==

(function(window, load){
    if (this.chrome && !load){
        var source = '(' + arguments.callee.toString() + ')(this, true);';
        var script = document.createElement('script'); 
        script.appendChild(document.createTextNode(source));
        document.body.appendChild(script);
        return;
    }   
    function init(){
        var damn = function(){};
        Element.prototype.webkitRequestFullscreen = damn;
        //Element.prototype.webkitRequestFullScreen = damn;
    }   
    try{ 
        init();
    }
    catch(e){
        console.log(e);
    }
})(this.unsafeWindow);