code: function urlX(link)
  	{
  		if (link != null && link.toString().toLowerCase().substring(0, 11) !== 'javascript:')
  		{
  			return link;
  		}
  		
  		return null;
  	}
docs: Uses https://code.google.com/p/google-caja/wiki/JsHtmlSanitizer NOTE: Original minimized sanitizer was modified to support data URIs for images, mailto and special data:-links. LATER: Add MathML to whitelisted tags