//if ( n != undefined ) {
//    n = undefined;
//    nth = undefined;
//    topthm = undefined;
//    maxthm = undefined;
//    picnams = undefined;
//    btnnams = undefined;
//    btns = undefined;
//    thms = undefined;
//    pix = undefined;
//	pictitle = undefined;
//    imgdir = undefined;
//    thmdir = undefined;
//    systhmdir = undefined;
//	maintitl = undefined;
//}

var systhmdir = "../Images/Nav_buttons";
var n = 0;
var nth = 0;
var topthm = 0;
var curpic = 0;
var maxthm = thmnams.length;
var picnams = thmnams;
var btnnams = ["Scrollup_up","Scrolldown_up","Reset_up","Scrollup_over","Scrolldown_over","Reset_over",
               "Previous_up","Previous_over","Next_up","Next_over" ];

btns = new Array();
for ( nth = 0; nth < btnnams.length; nth++ ) {
    btns[nth] = new Image();
    btns[nth].src = systhmdir + "/" + btnnams[nth] + ".png";
}

thms = new Array();
pix = new Array();
for ( nth = 0; nth < maxthm; nth++ ) {
    thms[nth] = new Image();
    pix[nth] = new Image();
}
// load now what's going to be displayed first

pix[0].src = imgdir + "/" + picnams[0] + ".jpg";

for ( nth = 0; nth < 4; nth++ ) {
    thms[nth].src = thmdir + "/" + thmnams[nth] + ".jpg";
    pix[nth].src = imgdir + "/" + picnams[nth] + ".jpg";
}