title: Rich Text (YUI-2.5.2) Editor Broken on IE11
body: <p>I'm facing same issue mentioned in this link(<a href="https://stackoverflow.com/questions/20149312/rich-text-yui-editor-broken-on-ie11).Here">Rich Text (YUI) Editor Broken on IE11</a> they have given solution for YUI(2.9) but I'm using <strong>YUI(2.5.2</strong>) in my application.I didn't find <strong>YAHOO.env.parseUA</strong> in yahoo-dom-event.js.I have searched for <strong>YAHOO.env.parseUA</strong> property in <strong>YUI(2.5.2) libraries</strong>.Can anyone suggest how to fix this for YUI(2.5.2).</p>