$(document).ready(function(){
    $('#content_hidden').hide();
    $('#last_project a').mouseover(function(){
        var class_name = $(this).attr("rel");
        class_name = '#' + class_name;
        var data_info = $(class_name).html();
        $('#tooltip1').html(data_info);
    }).tooltip({
        events: {
            def: "mouseover,blur",
            tooltip: "mouseover,mouseout"
        },
        // place tooltip on the right edge
        position: "top center",
        // use the built-in fadeIn/fadeOut effect
        effect: 'fade',
        //effect: 'slide',
        offset: [-5, 210],
        // use this single tooltip element
        tip: '#tooltip1'
    });
});