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How do I develop and use classes in Javascript?

Last Modified: 2013-11-19

I am developing a small library of functions. There may be a need where these functions could potentially interfere with each other so I need to put them into a class which than can be given an instance of.

Question is, How do I do it? And then how do I use the class?
I tried doing something like this but it does not work...
---- in the .js file ----
class JsLib
  public function Func1 ()
  public function Func2 ()
--- in html, the .js is included, then ---
<script type="text/javascript>
function Exec()
   var a = new JsLib();
<a href="javascript:Exec();">test</a>

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