//this sets the naviagation buttons visible or not depending on the number of images

 var showImages = document.getElementById("ctl00_ContentPlaceHolder1_HFshowImages");
 
 if (showImages != null){
    //alert("showImages="+showImages.value);
    if (showImages.value == "false"){
        $(window).load(function() {$('#slider').nivoSlider({effect:'fade',directionNav:false,controlNav:false});});
    }else{
        $(window).load(function() {$('#slider').nivoSlider({effect:'fade'});});      
    }
}