$(document).ready(function(){
    var faded = false;
    $('.menu a').click(function(){
        var portfolio = $('.menu a[rel=portfolio]').attr('rel');
        var linkrel = $(this).attr('rel');
        if(linkrel == portfolio){
            $('.thumbnail_work a').parent().animate({
                'opacity': 1
            }, 'slow');
            faded = false;
        } else { 
            $('.thumbnail_work a[rel='+linkrel+']').parent().animate({
                'opacity': 1
            }, 'slow');
            $('.thumbnail_work a[rel!='+linkrel+']').parent().animate({
                'opacity': 0.2
            }, 'slow');
            faded = true;
        }
        
    });
    $('.thumbnail_work a').hover(function(){
        if (faded == true){
            $(this).parent().animate({
                'opacity': 1
            }, 'slow');
        }
    });
});