var current = 0;
var currentcookie = 0;

$(document).ready(function() {
	$('#vorige').css('display','none');
	if($.cookie("rogerbeckers_slider") > 0){
		current = parseInt($.cookie("rogerbeckers_slider")); 
		currentcookie = current;
		slideLeft(3);	
	}
	
	$('.lesson').hover(function() {
           var winid = $(this).find('.tag').html();
           $(this).closest('.block').addClass('hover');
           $('#info_' + winid).animate({opacity: "show"}, "fast");
    }, function(){
           var winid = $(this).find('.tag').html();
           $(this).closest('.block').removeClass('hover');
           $('#info_' + winid).animate({opacity: "hide"}, "fast");
    });
});



function slideLeft(maxnumer){
	if(currentcookie > 0){
		$('#sliderCntr ul').css("marginLeft",(-820)*currentcookie);
		var currentcookiepluseen = currentcookie+1;

		 if(maxnumer==currentcookiepluseen){
		 	$('#vorige').css('display','block');
	    	$('#volgende').css('display','none');
	    }else{
	    	$('#vorige').css('display','block');
	    	$('#volgende').css('display','block');
	    }
	    currentcookie = 0;
	}else{
		current++;

		$.cookie("rogerbeckers_slider", parseInt(current), { path: '/',expires: 1 });
		
		$('#sliderCntr ul').animate({
		      'marginLeft' : (-820)*current
	    });
	    
	    if(maxnumer==current){
	    	$('#vorige').css('display','block');
	    	$('#volgende').css('display','none');
	    }else{
	    	$('#vorige').css('display','block');
	    	$('#volgende').css('display','block');
	    }
    }
    
}

function slideRight(){
	current--;
	
	$.cookie("rogerbeckers_slider", parseInt(current), { path: '/',expires: 1 });
	
	$('#sliderCntr ul').animate({
	      'marginLeft' : (-820)*current
    });
	
	if(current==0){
		$('#vorige').css('display','none');
		$('#volgende').css('display','block');
	}else{
		$('#volgende').css('display','block');
    	$('#vorige').css('display','block');
    }
	
}