function Is() {
    var agent = navigator.userAgent.toLowerCase();
    this.major = parseInt(navigator.appVersion);
    this.minor = parseFloat(navigator.appVersion);
    this.ns  = ((agent.indexOf('mozilla')!=-1) && ((agent.indexOf('spoofer')==-1) && (agent.indexOf('compatible') == -1)));
    this.ns2 = (this.ns && (this.major == 2));
    this.ns3 = (this.ns && (this.major == 3));
    this.ns4b = (this.ns && (this.minor < 4.04));
    this.ns4 = (this.ns && (this.major >= 4));
    this.ie   = (agent.indexOf("msie") != -1);
    this.ie3  = (this.ie && (this.major == 2));
    this.ie4  = (this.ie && (this.major >= 4));
    this.op3 = (agent.indexOf("opera") != -1);
    this.win   = (agent.indexOf("win")!=-1);
    this.mac   = (agent.indexOf("mac")!=-1);
    this.unix  = (agent.indexOf("x11")!=-1);
}

var is = new Is();

if(is.ns4) {
    doc = "document";
    sty = "";
    htm = ".document"
} else if(is.ie4) {
    doc = "document.all";
    sty = ".style";
    htm = ""
}
function positionLayers() {
    overviewObj = eval(doc + '["overviewLyr"]' + sty);
}

function status(txt) {
self.status = txt
}

function clear() {
self.status = ""
}

var menu_selection = "overview";

var loop = true;
var direction = "up";
var speed = 10;
var timer1 = null;

function scroll(dir,spd) {
    direction = dir;
    speed = spd;
    var page = eval(menu_selection + "Obj");
    var y_pos = parseInt(page.top);
    var x_pos = parseInt(page.left);
    if(loop == true) {
        if(direction == "dn") {
            page.top = (y_pos-(speed));
            clearTimeout(timer1);
            timer1 = setTimeout("scroll(direction,speed)", 1);
        } else if(direction == "up") {
//        } else if(direction == "up" && y_pos < 10) {
            page.top = (y_pos+(speed));
            clearTimeout(timer1);
            timer1 = setTimeout("scroll(direction,speed)", 1);
        } else if(direction == "top") {
            page.top = 10;
        } else if(direction == "none") {
        }
    }
}