Scripting CSS style sheets...

gistfile1.js

function installCSS() {
		var styleEl = document.createElement('style');
		styleEl.id = "inline-editor-css";
		document.head.appendChild(styleEl);
		var sheet = styleEl.sheet;
		var rules = sheet.rules;
		
		sheet.insertRule('.editor { width: 100%; position: relative; display: none; }', rules.length);
		sheet.insertRule('.editor textarea { width: 100%; display: block; }', rules.length);
		sheet.insertRule('.editor .button.ok { position: absolute; left: 0; top: 100%; }', rules.length);
		sheet.insertRule('.editor.visible { display: inline-block; }', rules.length);
		
		installCSS = function() {};
	}