this always refers to the object in which it is set. Example: <a href="yahoo.com" onmouseover="alert(this.href)"> This refers to the anchor (<a>) object. "href" is one of its properties. It gets the value of that property and alerts it.
to the options list and tested it in my web server and it functions just fine.
If you can't think outside the box, you will be trapped forever with no escape...