Gray and centered HTML pages のソースコード

Gray and centered HTML pages

Makes HTML pages easy to read by setting the body to center, the background color to gray and the font size to 16pt.

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// ==UserScript==
// @name        Gray and centered HTML pages
// @description Makes HTML pages easy to read by setting the body to center, the background color to gray and the font size to 16pt.
// @namespace   hugsmile.eu
// @include     *.html
// @include     *htm
// @version     0.2
// @grant       none
// ==/UserScript==

(function () {
    function addCss(cssString) { 
        var head = document.getElementsByTagName('head')[0]; 
        if(head){
            var newCss = document.createElement('style'); 
            newCss.type = "text/css"; 
            newCss.innerHTML = cssString; 
            head.appendChild(newCss);
        }
    }
    var script = document.getElementsByTagName('script')[0];
    if(!script){
        addCss ('body { width: 50%;  margin: 0 auto; background-color: gray; font-size: 16pt;}');
    }
})();