$('document').ready(function(){  
    updatestatus();  
    scrollalert();  
});  
function updatestatus(){  
    //Show number of loaded items  
    var totalItems=$('#content p').length;  
    $('#status').text('Loaded '+totalItems+' Items');  
}  
function scrollalert(){  
    var scrolltop=$('#scrollbox').attr('scrollTop');  
    var scrollheight=$('#scrollbox').attr('scrollHeight');  
    var windowheight=$('#scrollbox').attr('clientHeight');  
    var scrolloffset=20;  
    if(scrolltop>=(scrollheight-(windowheight+scrolloffset)))  
    {  
        //fetch new items  
        $('#status').text('Loading more items...');  
        $.get('scroll-items.html', '', function(newitems){  
            $('#content').append(newitems);  
            updatestatus();  
        });  
    }  
    setTimeout('scrollalert();', 1500);  
}