var blankSrc = '/image/blank.gif';

var PolaroidArrows = new function() {
	var ImgElem;
	var AElem;
	this.init = function() {
		var self = PolaroidArrows;
		if (!document.getElementById) return;
		var Container = document.getElementById('PolaroidContainer');
		if (!Container) return;
		self.ImgElem = Container.getElementsByTagName('img')[0];
		self.AElem  = Container.getElementsByTagName('a')[0];
		if (!self.ImgElem || !self.AElem) return;
		Container = null;
	},
	
	this.prev = function() {
		var self = PolaroidArrows;
		PolaroidStart--;
		if (!PolaroidStart) PolaroidStart = Polaroids.length-1;
		self.setPolaroid(Polaroids[PolaroidStart][0], Polaroids[PolaroidStart][1]);
	},
	
	this.next = function() {
		var self = PolaroidArrows;
		PolaroidStart++;
		if (PolaroidStart >= Polaroids.length) PolaroidStart=0;
		self.setPolaroid(Polaroids[PolaroidStart][0], Polaroids[PolaroidStart][1]);
	},
	
	this.setPolaroid = function(Id, Link) {
		var self = PolaroidArrows;
		if (LowMsie) {
			var start = self.ImgElem.style.filter.substr(0, self.ImgElem.style.filter.indexOf(PolaroidPrefix)+PolaroidPrefix.length)+Id+'.png';
			var ende = self.ImgElem.style.filter.substr(self.ImgElem.style.filter.indexOf(PolaroidPrefix)+PolaroidPrefix.length);
			ende = ende.substr(ende.indexOf('.png')+4);
			self.ImgElem.style.filter = start+ende;
		}
		else {
			self.ImgElem.src = self.ImgElem.src.substr(0, self.ImgElem.src.indexOf(PolaroidPrefix)+PolaroidPrefix.length)+Id+'.png';
		}
		self.AElem.href = '/trips/'+Link+'.html';
	},
	
	
	this.cleanup = function() {
		var self = PolaroidArrows;
		self.ImgElem = null;
		self.AElem = null;
	}
}
addEvent(window, 'load', PolaroidArrows.init);
addEvent(window, 'unload', PolaroidArrows.cleanup);

/*
var PolaroidRot = new function() {
	var ImgElem;
	var AElem;
	this.init = function() {
		var self = PolaroidRot;
		if (!document.getElementById) return;
		var Container = document.getElementById('PolaroidContainer');
		if (!Container) return;
		self.ImgElem = Container.getElementsByTagName('img')[0];
		self.AElem  = Container.getElementsByTagName('a')[0];
		if (!self.ImgElem || !self.AElem) return;
		Container = null;
		setInterval(self.tick, 5000);
	},
	
	this.tick = function() {
		var self = PolaroidRot;
		PolaroidStart++;
		if (PolaroidStart >= Polaroids.length) PolaroidStart=0;
		self.setPolaroid(Polaroids[PolaroidStart][0], Polaroids[PolaroidStart][1]);
		return;
	},
	
	this.setPolaroid = function(Id, Link) {
		var self = PolaroidRot;
		self.ImgElem.src = self.ImgElem.src.substr(0, self.ImgElem.src.indexOf(PolaroidPrefix)+PolaroidPrefix.length)+Id+'.png';
		self.AElem.href = '/trips/'+Link+'.html';
	},
	
	this.cleanup = function() {
		var self = PolaroidRot;
		self.ImgElem = null;
		self.AElem = null;
	}
}
addEvent(window, 'unload', PolaroidRot.cleanup);
addEvent(window, 'load', PolaroidRot.init);
*/