var tabArray3 = ["about_us","deadlines1"];
var tabArray4 = ["adrates","deadlines2"];
var tabArray5 = ["awards_2010","awards_2009","awards_guidelines"];
var tabArray6 = ["archives_basic","archives_advanced","archives_popular"];

var flagArray1 = [1,0,0,0,0];
var flagArray2 = [1,0,0];
var flagArray3 = [1,0];
var flagArray4 = [1,0];
var flagArray5 = [1,0,0];
var flagArray6 = [1,0];
	
var ajaxFilePath = "/ajax/";

var SlidingTabs = new Class({
  options: {
    startingSlide: false,
    activeButtonClass: 'active',
    activationEvent: 'click',
    wrap: true,
    slideEffect: {
      duration: 400,
	  transition: Fx.Transitions.Quad.easeInOut
    },
    animateHeight: true,
    rightOversized: 0
  },
  current: null,
  buttons: false,
  outerSlidesBox: null,
  innerSlidesBox: null,
  panes: null,
  fx: null,
  heightFx: null,
  
  initialize: function(buttonContainer, slideContainer, options) {
    if (buttonContainer) { this.buttons = $(buttonContainer).getChildren(); }
    this.outerSlidesBox = $(slideContainer);
    this.innerSlidesBox = this.outerSlidesBox.getFirst();
    this.panes = this.innerSlidesBox.getChildren();

    this.setOptions(options);
    
    this.fx = new Fx.Scroll(this.outerSlidesBox, this.options.slideEffect);
    this.heightFx = this.outerSlidesBox.set('height', this.options.slideEffect);

    this.current = this.options.startingSlide ? this.panes.indexOf($(this.options.startingSlide)) : 0;
    if (this.buttons) { this.buttons[this.current].addClass(this.options.activeButtonClass); }
    
    this.outerSlidesBox.setStyle('overflow', 'hidden');
    this.panes.each(function(pane, index) {
      pane.setStyles({
       'float': 'left',
       'overflow': 'hidden'
      });
    }.bind(this));
    
    this.innerSlidesBox.setStyle('float', 'left');
    
    if (this.options.startingSlide) this.fx.toElement(this.options.startingSlide);
    
    if (this.buttons) this.buttons.each( function(button) {
      button.addEvent(this.options.activationEvent, this.buttonEventHandler.bindWithEvent(this, button));
    }.bind(this));
    
    if (this.options.animateHeight)
      this.heightFx.set(this.panes[this.current].offsetHeight);
	  this.recalcWidths();
  },
  
  changeTo: function(element, animate) {
    if ($type(element) == 'number') element = this.panes[element - 1];
	if (!$defined(animate)) animate = true;
    var event = { cancel: false, target: $(element), animateChange: animate };
    this.fireEvent('change', event);
    if (event.cancel == true) { return; };
 
    if (this.buttons) { this.buttons[this.current].removeClass(this.options.activeButtonClass); };
    this.current = this.panes.indexOf($(event.target));

	var oldHeight = this.outerSlidesBox.getStyle('height');
	this.panes[this.current].setStyle('display','block');
	var oldHeight = this.outerSlidesBox.setStyle('height', oldHeight);

	if (this.buttons) { this.buttons[this.current].addClass(this.options.activeButtonClass); };
    this.fx.cancel();

	if (event.animateChange) {
      this.fx.toElement(event.target);
    } else {
      this.outerSlidesBox.scrollTo(this.current * this.outerSlidesBox.offsetWidth.toInt(), 0);
    }
    
    if (this.options.animateHeight)
      this.heightFx.tween('height',this.panes[this.current].offsetHeight);
	  
	this.loadContent(this.current);
  },
  
  buttonEventHandler: function(event, button) {
    if (event.target == this.buttons[this.current]) return;
    this.changeTo(this.panes[this.buttons.indexOf($(button))]);
},
  
  next: function() {
    var next = this.current + 1;
    if (next == this.panes.length) {
      if (this.options.wrap == true) { next = 0 } else { return }
    }
    this.changeTo(this.panes[next]);
  },
  
  previous: function() {
    var prev = this.current - 1
    if (prev < 0) {
      if (this.options.wrap == true) { prev = this.panes.length - 1 } else { return }
    }
    this.changeTo(this.panes[prev]);
  },

  loadContent: function(tab) {
	var date = new Date();
	var tStamp = date.getTime();

	if(this.panes.indexOf($(tabArray3[tab]))>=0 && !flagArray3[tab]) {
		flagArray3[tab] = 1;
		var url = ajaxFilePath + tabArray3[tab] + '.html';
		$(tabArray3[tab]).load(url + '?t='+tStamp); // load default tab content
	}
	else if(this.panes.indexOf($(tabArray4[tab]))>=0 && !flagArray4[tab]) {
		flagArray4[tab] = 1;
		var url = ajaxFilePath + tabArray4[tab] + '.html';
		$(tabArray4[tab]).load(url + '?t='+tStamp); // load default tab content
	}
	else if(this.panes.indexOf($(tabArray5[tab]))>=0 && !flagArray5[tab]) {
		flagArray5[tab] = 1;
		var url = ajaxFilePath + tabArray5[tab] + '.html';
		$(tabArray5[tab]).load(url + '?t='+tStamp); // load default tab content
	}
	else if(this.panes.indexOf($(tabArray6[tab]))>=0 && !flagArray6[tab]) {
		flagArray6[tab] = 1;
		var url = ajaxFilePath + tabArray6[tab] + '.html';
		$(tabArray6[tab]).load(url + '?t='+tStamp); // load default tab content
	}
  },
  recalcWidths: function() {
    this.panes.each(function(pane, index) {
      pane.setStyle('width', this.outerSlidesBox.offsetWidth.toInt() - this.options.rightOversized + 'px');
    }.bind(this));
    
    this.innerSlidesBox.setStyle('width', (this.outerSlidesBox.offsetWidth.toInt() * this.panes.length) + 'px');
    if (this.current > 0) {
      this.fx.cancel();
      this.outerSlidesBox.scrollTo(this.current * this.outerSlidesBox.offsetWidth.toInt(), 0);
    }
  }
});

SlidingTabs.implement(new Options, new Events);

window.addEvent('load', function() {
								 
	var slidingtabs1 = new SlidingTabs('news_tabset', 'news_panes', {startingSlide: 'Headlines'});
	var slidingtabs2 = new SlidingTabs('indepth_tabset', 'indepth_panes', {startingSlide: 'InDepth_Rivers'});
	var slidingtabs3 = new SlidingTabs('aboutus_tabset', 'aboutus_panes', {startingSlide: tabArray3[0]});
	var slidingtabs4 = new SlidingTabs('rates_tabset', 'rates_panes', {startingSlide: tabArray4[0]});
	var slidingtabs5 = new SlidingTabs('awards_tabset', 'awards_panes', {startingSlide: tabArray5[0]});
	var slidingtabs6 = new SlidingTabs('archives_tabset', 'archives_panes', {startingSlide: tabArray6[0]});

	$('news_panes').setStyle('visibility','visible');
	$('indepth_panes').setStyle('visibility','visible');
	$('indepth_panes').setStyle('display','none');
	$('aboutus_panes').setStyle('visibility','visible');
	$('aboutus_panes').setStyle('display','none');
	$('rates_panes').setStyle('visibility','visible');
	$('rates_panes').setStyle('display','none');
	$('awards_panes').setStyle('visibility','visible');
	$('awards_panes').setStyle('display','none');
	$('archives_panes').setStyle('visibility','visible');
	$('archives_panes').setStyle('display','none');

	window.addEvent('resize', slidingtabs1.recalcWidths.bind(slidingtabs1));
	window.addEvent('resize', slidingtabs2.recalcWidths.bind(slidingtabs2));
	window.addEvent('resize', slidingtabs3.recalcWidths.bind(slidingtabs3));
	window.addEvent('resize', slidingtabs4.recalcWidths.bind(slidingtabs4));
	window.addEvent('resize', slidingtabs5.recalcWidths.bind(slidingtabs5));
	window.addEvent('resize', slidingtabs6.recalcWidths.bind(slidingtabs6));
});