activeDiv = 0;
var totalCount = 0;

function sw(divToOpen) {

    if (activeDiv != null)
    {
        var divToClose = $("#divLoop").find("div.loopHolder")[activeDiv];
        $(divToClose).hide()            
        
    }

    var divTarget = $("#divLoop").find("div.loopHolder")[divToOpen];
    
    if (divTarget != null)
    {
        $(divTarget).show()    
        activeDiv = parseInt(divToOpen);
    }

}

$(document).ready(function() {

    sw(0);
    totalCount = ($("div.loopHolder").length - 1);
    
});

function doN(navDir) {

    var toShow = 0;
    if (navDir == 'p') {
    
        if (activeDiv == 0) {
        
            toShow = (totalCount);
            
        } else {
        
            toShow = (activeDiv - 1);
        
        }
        
    
    }

    if (navDir == 'n') {
    
        if (activeDiv == (totalCount)) {
        
            toShow = 0;
            
        } else {
        
            toShow = (activeDiv + 1);
        
        }
    
    }
    
    sw(toShow);
    
}