help me please netscape

je n'arrive pas a faire passer le code suivant sous netscape, meme apres un etonne d'aspirine!

<SCRIPT LANGUAGE="JavaScript">
var lft = 10; // (window.screen.width/2);
var pos = 10; // initial top position
var stp = 10; // step increment size
var spd = 500; // speed of increment
var spd2 = 50; // speed of increment
var upr = -390; // upper limiter
var lwr = 100; // lower limiter
var tim; // timer variable
function scroll_up() {
if(pos > upr) pos -= stp;
do_scroll(pos);
tim = setTimeout("scroll_up()", spd);
}

function scroll_up2() {
if(pos > upr) pos -= stp;
do_scroll(pos);
tim = setTimeout("scroll_up2()", spd2);
}

function scroll_dn() {
if(pos < lwr) pos += stp;
do_scroll(pos);
tim = setTimeout("scroll_dn()", spd);
}

function scroll_dn2() {
if(pos < lwr) pos += stp;
do_scroll(pos);
tim = setTimeout("scroll_dn2()", spd2);
}

function do_scroll(pos) {
divTxt.style.top = pos;
}

function no_scroll() {
clearTimeout(tim);
}


</SCRIPT>

merci d'avance