Александр Таратин

$('.tree-content').hide();
$('.tree-block').hover(function () {
    $(this).children('.tree-content').show();
},

function () {
    $(this).children('.tree-content').hide();
});

$('.sl-item').click(function(){
$('#central-image').attr('src',$(this).data('path-to-full-image'));
})