/* Simple JavaScript Inheritance
 * By John Resig http://ejohn.org/
 * MIT Licensed.
 */
// Inspired by base2 and Prototype
(function(){
  var initializing = false, fnTest = /xyz/.test(function(){xyz;}) ? /\b_super\b/ : /.*/;

  // The base Class implementation (does nothing)
  this.Class = function(){};

  // Create a new Class that inherits from this class
  Class.extend = function(prop) {
    var _super = this.prototype;

    // Instantiate a base class (but only create the instance,
    // don't run the init constructor)
    initializing = true;
    var prototype = new this();
    initializing = false;

    // Copy the properties over onto the new prototype
    for (var name in prop) {
      // Check if we're overwriting an existing function
      prototype[name] = typeof prop[name] == "function" &&
        typeof _super[name] == "function" && fnTest.test(prop[name]) ?
        (function(name, fn){
          return function() {
            var tmp = this._super;

            // Add a new ._super() method that is the same method
            // but on the super-class
            this._super = _super[name];

            // The method only need to be bound temporarily, so we
            // remove it when we're done executing
            var ret = fn.apply(this, arguments);
            this._super = tmp;

            return ret;
          };
        })(name, prop[name]) :
        prop[name];
    }

    // The dummy class constructor
    function Class() {
      // All construction is actually done in the init method
      if ( !initializing && this.init )
        this.init.apply(this, arguments);
    }

    // Populate our constructed prototype object
    Class.prototype = prototype;

    // Enforce the constructor to be what we expect
    Class.constructor = Class;

    // And make this class extendable
    Class.extend = arguments.callee;

    return Class;
  };
})();

//Auto Scroller -- defaults to horizontal
var AutoScroller = {
	init : function(selector,direction){
	    //Get our elements for faster access and set overlay width
	    var div = $(selector),
             ul = $(selector + ' ul'),
             // unordered list's margin
             ulPadding = 55;

	    //Get container width
	    var divSize = (direction == 'vertical') ? this.getHeight(div) : this.getWidth(div);
		var context = this;
		var offset = 5;
	    //Remove scrollbars
	    div.css({overflow: 'hidden'});
	
	    //Find last image container
	    var lastLi = ul.find('li:last-child');
		var styled = false;
	    //When user move mouse over menu
	    div.mousemove(function(e){
	    	if(styled == false){				
				ul.css({paddingLeft:'35px',paddingRight:'35px'});
				styled = true;
	    	}
	    	if(direction == 'vertical'){
	    		divSize = context.getHeight(div);
		        //recalculate each time
		        var ulHeight = lastLi[0].offsetTop + lastLi.outerHeight() + ulPadding;		
		        var top = ((e.pageY - div.offset().top) * (ulHeight-divSize) / divSize);
		        div.scrollTop(top);
	    	}
	    	else{
	    	   divSize = context.getWidth(div);
		       //recalculate each time
		       var ulWidth = lastLi[0].offsetLeft + lastLi.outerWidth() + ulPadding;
		       var left = ((e.pageX - div.offset().left) * (ulWidth-divSize) / divSize);
		       div.scrollLeft(left);

	    	}
	    });
	},
	getWidth : function(el){
		return el.width();
	},
	getHeight : function(el){
		return el.height();
	}
};