$.scrollTo.defaults.axis = 'y';

var currentPos = 1;
var projectsShowAtOnce = 4;
var totalPages = 0;
var movePixels = 480;
var moveTo = 0;
var moveStop = 0;
	
function scroll(scrollDir) {

    if (scrollDir == 'u') {
        if (currentPos > 1) {
        
            moveTo = (moveTo - movePixels);
            currentPos = (currentPos - 1);
            
        }
    }

    if (scrollDir == 'd') {
    
        if (currentPos < totalPages) {
            currentPos = (currentPos + 1);
            moveTo = (moveTo + movePixels);
            
        }            
    }    
    
    var $paneTarget = $('#outerHolder');
    var scrollHash = "{left:0,top:" + moveTo + "}";
    $paneTarget.stop().scrollTo(eval("(" + scrollHash + ")"), 1000);
 //   $("#status").text(moveStop + " - " + moveTo);
    
    rebuildNavs();

}

function rebuildNavs() {


    if (currentPos == 1) {

        $("#spanDownControl").attr("class", "projectsScroll_down_on");
        $("#spanUpControl").attr("class", "projectsScroll_up_off");        
    
    } else {
    
        if (currentPos == totalPages) {
        
            $("#spanDownControl").attr("class", "projectsScroll_down_off");
            $("#spanUpControl").attr("class", "projectsScroll_up_on");              
        
        } else {
        
            $("#spanUpControl").attr("class", "projectsScroll_up_on");
            $("#spanDownControl").attr("class", "projectsScroll_down_on");            
        
        }    

    }

}

/* figure out how many ding dongs we got */
$(document).ready(function() {    

    totalProjects = $("#innerHolder").find(".project").length;
    
    totalPages = Math.ceil(totalProjects / 4);
    
    rebuildNavs();

});