var containerSize = 848;
var pos = 0;

$(document).ready(function() {
	Slider.checkButtons();
});

var Slider = {
	prev : function()
	{
		pos--;
		Slider.checkButtons();
		
		var newPos = $('#boxslider').css('left').replace('px', '');
		newPos = parseInt(newPos) + 94;
		
		$('#boxslider').animate(
				{ left: newPos + 'px' }, 100, 
				function() 	{
					Slider.checkButtons();
				}
		);
	},
	next : function()
	{
		if (Slider.hasNext())
		{
			pos++;
			Slider.checkButtons();
			
			var newPos = $('#boxslider').css('left').replace('px', '');
			newPos = parseInt(newPos) - 94;
			
			$('#boxslider').animate(
					{ left: newPos + 'px' }, 100, 
					function() 	{
						Slider.checkButtons();
					}
			);
		}
	},
	checkButtons : function ()
	{
		if (pos == 0)
			$('#prev').hide();
		else
			$('#prev').show();
		
		if (Slider.hasNext())
			$('#next').show();
		else
			$('#next').hide();
	},
	hasNext : function ()
	{
		var total = $('#boxslider').css('width').replace('px', '');

		var totalPos = (parseInt(total) - containerSize) / 94;
		
		if (pos < totalPos)
			return true;
		
		return false;
	}
}