var Subject = new Array ("studies","architecture","ceramics","digital","furniture","glass","graphic","industrial","interior","jewelry","landscape","painting","photography","printmaking","sculpture","teaching","textiles");
       
var CurrentUrl = location.href;

// trim string
CurrentUrl = CurrentUrl.substr("29").replace("Default.aspx","");
CurrentUrl = CurrentUrl.replace("/","");

      //alert(Subject.length); 
      e = Subject.length
       
        for (var i=0; i < e; i++) {
            if (Subject[i] == CurrentUrl) {
                currIndex = i;
            }
        }


    function goNext() {
        //alert(currIndex); 
        if (currIndex == (e - 1)) {
            window.location.href='../' + Subject[0] + '/Default.aspx';
        } else {
            window.location.href='../' + Subject[currIndex + 1] + '/Default.aspx';
        }
    }   
    
    function goPrevious() {
        if (currIndex == 0) {
            window.location.href='../' + Subject[e-1] + '/Default.aspx';
        } else {
            window.location.href='../' + Subject[currIndex - 1] + '/Default.aspx';
        }    
        
    }