$(function() {
    var ele   = $('#testo');
    var speed = 80, scroll = 5, scrolling;
    
    $('#scroll-up').mouseenter(function() {
        // Scroll the element up
        scrolling = window.setInterval(function() {
            ele.scrollTop( ele.scrollTop() - scroll );
        }, speed);
    });
    
    $('#scroll-down').mouseenter(function() {
        // Scroll the element down
        scrolling = window.setInterval(function() {
            ele.scrollTop( ele.scrollTop() + scroll );
        }, speed);
    });
    
    $('#scroll-up, #scroll-down').bind({
        click: function(e) {
            // Prevent the default click action
            e.preventDefault();
        },
        mouseleave: function() {
            if (scrolling) {
                window.clearInterval(scrolling);
                scrolling = false;
            }
        }
    });
});

$(function() {
    var ele   = $('#testo2');
    var speed = 80, scroll = 5, scrolling;
    
    $('#scroll-up').mouseenter(function() {
        // Scroll the element up
        scrolling = window.setInterval(function() {
            ele.scrollTop( ele.scrollTop() - scroll );
        }, speed);
    });
    
    $('#scroll-down').mouseenter(function() {
        // Scroll the element down
        scrolling = window.setInterval(function() {
            ele.scrollTop( ele.scrollTop() + scroll );
        }, speed);
    });
    
    $('#scroll-up, #scroll-down').bind({
        click: function(e) {
            // Prevent the default click action
            e.preventDefault();
        },
        mouseleave: function() {
            if (scrolling) {
                window.clearInterval(scrolling);
                scrolling = false;
            }
        }
    });
});