var mylib = {
	getElementsByClassName : function(className) {
		var els = new Array();

		try {
			if (parent.document.getElementsByClassName) {
				els = parent.document.getElementsByClassName(className);
			} else {
				var docList = parent.document.all || parent.document.getElementsByTagName('*');

				for (var i=0; i<docList.length; i++) {
					if (docList[i].className == className) {
						els.push(docList[i]);
					}
				}
			}
		} catch (err) {
			// fail silently
			els = new Array();
			return els;
		}

		return els;
	}
};

var basket = {
	fields : Array,

	addListeners : function(className) {
		this.fields = mylib.getElementsByClassName(className);

		for (var i=0; i<this.fields.length; i++) {
			this.fields[i].onchange = basket.submit;
		}
	},

	submit : function() {
		if (parent.document.getElementById('basketForm')) {
			var targetForm = parent.document.getElementById('basketForm');
			targetForm.submit();
		}
	}
};

var searchtool = {
	el : String,
	set : Boolean,

	init : function() {
		this.set = false;

		try {
			this.el = parent.document.getElementById("q");
		} catch (err) {
			// Fail silently
			return false;
		}
		this.set = true;
		return true;
	},

	getel : function() {
		return this.el;
	},

	focused : function() {
		if (this.set && (this.el.size != 27)) {
			this.el.size = 27;
		}
	},

	blurred : function() {
		if (this.set && (this.el.size != 20)) {
			this.el.size = 20;
		}
	}
};

var autoupdate = {
	targetEls : Array,

	set : function() {
		try {
			if (!getCookie('autoupdate')) {
				this.disable();
			} else if (getCookie('autoupdate') == 0) {
				throw new Exception("cookie failed");
			}

			this.targetEls = mylib.getElementsByClassName("auto");

			for ( var i = 0; i < this.targetEls.length; i++) {
				switch (this.targetEls[i].nodeName) {
				case 'INPUT':
				case 'SELECT':
					//this.targetEls[i].setAttribute('onchange', 'submit()');
					this.targetEls[i].onchange = basket.submit;
					break;
				}
			}
		} catch (err) {
			return false;
		}

		return true;
	},

	basket : function () {
		if (parent.document.getElementById("basketForm")) {
			var targetForm = parent.document.getElementById("basketForm");
			targetForm.submit();
		}
	},

	disable : function() {
		try {
			setCookie('autoupdate', 0, 30);
			window.location.reload();
		} catch (err) {
			return false;
		}
	},

	enable : function() {
		try {
			setCookie('autoupdate', 1, 30);
			window.location.reload();
		} catch (err) {
			return false;
		}
	},

	addDisable : function() {
		var d = parent.document;
		var spanEl = d.createElement("span");
		var linkEl = d.createElement("a");

		linkEl.setAttribute('href', "javascript:void autoupdate.disable();");
		linkEl.innerHTML = "Disable autoupdate";
		spanEl.appendChild(linkEl);

		if (d.getElementById("options")) {
			d.getElementById("options").appendChild(spanEl);
		}
	},

	addEnable : function() {
		var d = parent.document;
		var spanEl = d.createElement("span");
		var linkEl = d.createElement("a");

		linkEl.setAttribute('href', "javascript:void autoupdate.enable();");
		linkEl.innerHTML = "Enable autoupdate";
		spanEl.appendChild(linkEl);

		if (d.getElementById("options")) {
			d.getElementById("options").appendChild(spanEl);
		}
	}

};

var banners = {
	alt : Array,
	current : Number,
	el : Object,
	filetype : String,
	items : Array,
	placeholder : String,
	prefix : String,
	runningTime : Number,
	total : Number,
	urls : Array,

	load : function(ph) {
		if (document.images && document.getElementById(ph)) {
			var preloaded = new Image();

			this.timer(0);

			this.current = new Number(0);
			this.placeholder = new String(ph);
			this.filetype = new String(".jpg");
			this.prefix = new String("/lib/img/banners/front/");
			this.items = new Array("night-care.jpg",
			"vote-2011.jpg",
			"melissa.jpg",
			"lavender-dreams.jpg",					   
   			"regen-serum.jpg",
   			"spring-skincare.jpg",
			"style-awards-2010.jpg",
			"best-makeup.jpg");
			
			this.alt = new Array("Your Skin Works while you sleep",
			"Cast your Vote for Dr.Hauschka. Vote for Dr.Hauschka as the best skin care brand and also the best natural beauty brand",
			"Sensitive Combination Skin",
			"Lavender Dreams. New! Lavender Dreams Make-up collection",
			"Triple Loyalty Points on Regenerating Serum",
			"Spring Skin Care - View our seasonal recommendations for your skin",
			"Dr.Hauschka voted best natural brand",
			"The UK's favourite natural Make-Up" );
			
			this.urls = new Array("/skincare/night-time",
			"http://www.thesundaytimes.co.uk/sto/public/styleawards/",
			"/products/face-care/melissa-day-cream",
			"/products/makeup/lavender-dreams",
			"/products/hero",
			"/skincare/seasonal/spring",
			"/news/2010/05/story-48",
			"/skincare/brand/natural-makeup");
			
			for (i = 0; i < this.items.length; i++) {
				this.items[i] = this.prefix.concat(this.items[i]);
				preloaded.src = this.items[i];
			}

			this.total = this.items.length;

			return true;
		}

		return false;
	},

	run : function() {
		this.el = document.getElementById(this.placeholder);

		if (this.current == this.total) {
			this.current = 0;
		}

		this.el.setAttribute("src", this.items[this.current]);
		this.el.setAttribute("alt", this.alt[this.current]);
		this.el.setAttribute("height", "276");

		this.el.parentNode.setAttribute("href", this.urls[this.current]);

		this.blendimage(1000);
		this.current++;

		setTimeout("banners.run()", 8000);

	},

	blendimage : function(millisec) {
		var speed = Math.round(millisec / 100);
		var timer = 0;

		this.el.style.backgroundImage = "url(" + this.el.src + ")";
		this.opacity(0);
		this.el.src = this.items[this.current];

		for (i = 0; i <= 100; i++) {
			setTimeout("banners.opacity(" + i + ")", (timer * speed));
			timer++;
		}
	},

	opacity : function(level) {
		var styleObj = this.el.style;

		styleObj.opacity = (level / 100);
		styleObj.MozOpacity = (level / 100);
		styleObj.KhtmlOpacity = (level / 100);
		styleObj.filter = "alpha(opacity=" + level + ")";
	},

	timer : function(t) {
		this.runningTime = t;
		t += 1;

		setTimeout("banners.timer(" + t + ")", 1000);
	}
};

/**
 * Strip specified elements from the DOM
 */
var stripper = {
	target : Array,

	go : function(sel, selType) {
		this.target = new Array();

		switch (selType) {
			case 'class':
				if (self.document.getElementsByClassName(sel)) {
					this.target = self.document.getElementsByClassName(sel);
				}
				break;
			case 'id':
				if (self.document.getElementById(sel)) {
					this.target[0] = self.document.getElementById(sel);
				}
				break;
			case 'tag':
				if (self.document.getElementsByTagName(sel)) {
					this.target = self.document.getElementsByTagName(sel);
				}
				break;
			default:
				return false;
		}

		/** @todo Expand function to enable more functionality */
		try {
			for (var i=0; i<this.target.length; i++) {
				var p = this.target[i].parentNode;

				for (var j=0; j<p.childNodes.length; j++) {
					if (p.childNodes[j].nodeName == this.target[i].nodeName) {
						p.removeChild(p.childNodes[j]);
					}
				}
			}
		} catch (err) {
			return false;
		}

		return true;
	}
};