Class

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      /**
       * Here is a way to create class in Javascript. There are many other ways.
       * Note: I explicitly omit to show private members as it is getting complicated.
       *        For simplicity, stick with the public members. 
       *        For more info, see http://javascript.crockford.com/private.html
       */
 
      // Employee class
      function Employee(sName)
      {
        // Public variables.
        this.name = sName;
        this.iWorkHours = 5;
      }
 
      // Implementation of functions.
      Employee.prototype.addWorkHours = function(iHours)
      {
        this.iWorkHours += iHours;
      }
 
      Employee.prototype.getWorkHours = function()
      {
        return this.iWorkHours;
      }
 
      // Create Employee object.
      var emplA = new Employee();
 
      // Direct access to public variable.
      emplA.name="Xuan Ngo";
 
      // Calling function.
      emplA.addWorkHours(10);
 
      // Display the results.
      window.alert(emplA.name+ ' worked for ' +emplA.getWorkHours()+ ' hrs.');
    </script>
 
    <title>Class example</title>
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http://www.phpied.com/3-ways-to-define-a-javascript-class/