/**
 * COMMON DHTML FUNCTIONS
 * These are handy functions I use all the time.
 *
 * By Seth Banks (webmaster at subimage dot com)
 * http://www.subimage.com/
 *
 * Up to date code can be found at http://www.subimage.com/dhtml/
 *
 * This code is free for you to use anywhere, just keep this comment block.
 */

/**
 * X-browser event handler attachment and detachment
 * TH: Switched first true to false per http://www.onlinetools.org/articles/unobtrusivejavascript/chapter4.html
 *
 * @argument obj - the object to attach event to
 * @argument evType - name of the event - DONT ADD "on", pass only "mouseover", etc
 * @argument fn - function to call
 */
function addEvent(obj, evType, fn){
 if (obj.addEventListener){
    obj.addEventListener(evType, fn, false);
    return true;
 } else if (obj.attachEvent){
    var r = obj.attachEvent("on"+evType, fn);
    return r;
 } else {
    return false;
 }
}
function removeEvent(obj, evType, fn, useCapture){
  if (obj.removeEventListener){
    obj.removeEventListener(evType, fn, useCapture);
    return true;
  } else if (obj.detachEvent){
    var r = obj.detachEvent("on"+evType, fn);
    return r;
  } else {
    alert("Handler could not be removed");
  }
}

/**
 * Code below taken from - http://www.evolt.org/article/document_body_doctype_switching_and_more/17/30655/
 *
 * Modified 4/22/04 to work with Opera/Moz (by webmaster at subimage dot com)
 *
 * Gets the full width/height because it's different for most browsers.
 */
function getViewportHeight() {
	if (window.innerHeight!=window.undefined) return window.innerHeight;
	if (document.compatMode=='CSS1Compat') return document.documentElement.clientHeight;
	if (document.body) return document.body.clientHeight; 

	return window.undefined; 
}
function getViewportWidth() {
	var offset = 17;
	var width = null;
	if (window.innerWidth!=window.undefined) return window.innerWidth; 
	if (document.compatMode=='CSS1Compat') return document.documentElement.clientWidth; 
	if (document.body) return document.body.clientWidth; 
}

/**
 * Gets the real scroll top
 */
function getScrollTop() {
	if (self.pageYOffset) // all except Explorer
	{
		return self.pageYOffset;
	}
	else if (document.documentElement && document.documentElement.scrollTop)
		// Explorer 6 Strict
	{
		return document.documentElement.scrollTop;
	}
	else if (document.body) // all other Explorers
	{
		return document.body.scrollTop;
	}
}
function getScrollLeft() {
	if (self.pageXOffset) // all except Explorer
	{
		return self.pageXOffset;
	}
	else if (document.documentElement && document.documentElement.scrollLeft)
		// Explorer 6 Strict
	{
		return document.documentElement.scrollLeft;
	}
	else if (document.body) // all other Explorers
	{
		return document.body.scrollLeft;
	}
}

// Text size controller

TextSizeController = function() {};
var t = TextSizeController;
var myTSC;

t.prototype.sizeList = ['small', 'medium', 'large'];
t.prototype.fontSizes = ['1em', '1.3em', '1.6em'];
t.prototype.h3Sizes = ['16px', '22px', '28px'];

t.prototype.init = function() {
	// Get the current size.
	var size = ($.cookie('textSize')!=null) ? $.cookie('textSize') : "small";
	
	// Set the size.
	this.setSize(size);
	
	// Set up callbacks.
	$("#textSizeControl a").bind("click", function(evt) {
		var id = $(evt.target).attr("rel");
		myTSC.setSize(id);
		evt.preventDefault();
	});
};

t.prototype.setSize = function(size) {
	var index;
	for (var i = 0; i < this.sizeList.length; i++) {
		if (this.sizeList[i] == size) {
			var index = i;
			this.activate(size);
		} else {
			this.deactivate(this.sizeList[i]);
		}
	}
	
	$(".zoomable").css("font-size",this.fontSizes[index]);
	$(".zoomable h3").css("font-size",this.h3Sizes[index]);
	$.cookie('textSize',size);
};

t.prototype.activate = function(size) {
	$("#textSizeControl a[rel='"+size+"']").each(function() {
			var p = $(this).parent();
			if (p.hasClass("inactive")) p.removeClass("inactive");
			if (!p.hasClass("active")) p.addClass("active");	
	});
};

t.prototype.deactivate = function(size) {
	$("#textSizeControl a[rel='"+size+"']").each(function() {	
			var p = $(this).parent();
			if (p.hasClass("active")) p.removeClass("active");	
			if (!p.hasClass("inactive")) p.addClass("inactive");
	});
	
};




// When DOM is ready.

$(document).ready(function(){
	// Center the main nav.
	var outerW = $("#mainNav").width();
	var innerW = $("#mainNav ul").width();
	var pad = Math.floor((outerW - innerW)/2);
	$("#mainNav ul").css({'float':'none',
						  'padding-left':pad + 'px'});
	
	// Set our font size zoom.
	myTSC = new TextSizeController();
	myTSC.init();
	
	// Draw the current year.
	$(".currentYear").text((new Date).getFullYear() + " ");				   
});