// font resize script
fontResize = {
	options: {
		maxStep:1.5,
		defaultFS: 1.1,
		resizeStep: 0.1,
		resizeHolder: 'body',
		cookieName: 'fontResizeCookie'
	},
	init: function() {
		this.domReady(function(){
			this.setDefaultScaling();
			this.addDefaultHandlers();
		});
		return this;
	},
	addDefaultHandlers: function() {
		this.addHandler('increase','inc');
		this.addHandler('decrease','dec');
		this.addHandler('reset');
	},
	setDefaultScaling: function() {
		if(this.options.resizeHolder == 'html') { this.resizeHolder = document.documentElement; }
		else { this.resizeHolder = document.body; }
		var cSize = this.getCookie(this.options.cookieName);
		if(cSize) {
			this.fSize = parseFloat(cSize,10)
		} else {
			this.fSize = this.options.defaultFS;
		}
		this.changeSize();
	},
	changeSize: function(direction) {
		if(typeof direction !== 'undefined') {
			if(direction == 1) {
				this.fSize += this.options.resizeStep;
				if (this.fSize > this.options.defaultFS * this.options.maxStep) this.fSize = this.options.defaultFS * this.options.maxStep;
			} else if(direction == -1) {
				this.fSize -= this.options.resizeStep;
				if (this.fSize < this.options.defaultFS / this.options.maxStep) this.fSize = this.options.defaultFS / this.options.maxStep;
			} else {
				this.fSize = this.options.defaultFS;
			}
		}
		this.resizeHolder.style.fontSize = this.fSize + 'em';
		this.updateCookie(this.fSize.toFixed(2));
		return false;
	},
	addHandler: function(obj, type) {
		if(typeof obj === 'string') { obj = document.getElementById(obj); }
		if(typeof obj !== 'undefined') {
			switch (type) {
				case 'inc':
					obj.onclick = this.bind(this.changeSize,this, [1]);
					break;
				case 'dec':
					obj.onclick = this.bind(this.changeSize,this, [-1]);
					break;
				default:
					obj.onclick = this.bind(this.changeSize,this, [0]);
			}
		}
	},
	domReady: function(fn) {
		var scope = this, calledFlag;
		(function(){
			if (document.addEventListener) {
				document.addEventListener('DOMContentLoaded', function(){
					if(!calledFlag) { calledFlag = true; fn.call(scope); }
				}, false)
			}
			if (!document.readyState || document.readyState.indexOf('in') != -1) {
				setTimeout(arguments.callee, 9);
			} else {
				if(!calledFlag) { calledFlag = true; fn.call(scope); }
			}
		}());
	},
	updateCookie: function(scaleLevel) {
		this.setCookie(this.options.cookieName,scaleLevel);
	},
	getCookie: function(name) {
		var matches = document.cookie.match(new RegExp("(?:^|; )" + name.replace(/([\.$?*|{}\(\)\[\]\\\/\+^])/g, '\\$1') + "=([^;]*)"));
		return matches ? decodeURIComponent(matches[1]) : undefined;
	},
	setCookie: function(name, value) {
		var exp = new Date();
		exp.setTime(exp.getTime()+(30*24*60*60*1000));
		document.cookie = name + '=' + value + ';' +'expires=' + exp.toGMTString() + ';' +'path=/';
	},
	bind: function(fn, scope, args){
		return function() {
			return fn.apply(scope, args || arguments);
		}
	}
}.init();