Netscape 4.7 men ikke Netscape 6

Hej,

Jeg er i gang med, at lave en webside. På en af siderne bruges layers. Koden til disse udskrives med javascript, da de er anderledes for IE end for NN. Men netscape 6 kan ikke forstå det der udskrives. Hvad kan der være galt? Koden er som følger:

<script language=\"Javascript\">
<!--
    browser_name = navigator.appName;
    var netscape = (browser_name == \"Netscape\")
    var explorer = (browser_name == \"Microsoft Internet Explorer\")

    if (explorer) {
        document.write(\'<style type=\"text/css\">\');
        document.write(\'#divUpControl{position:absolute; width:11; left:329; top:10; z-index:3; text-align: right}\');
        document.write(\'#divUpDownLine{position:absolute; width:1; left:334; top:23; height:248; z-index:3; text-align: right}\');
        document.write(\'#divDownControl{position:absolute; width:11; left:329; top:270; z-index:3; text-align: right}\');
        document.write(\'#divContainer{position:absolute; width:310; height:260; top:20; left:15;  visibility:hidden; z-index:1;}\');
        document.write(\'#divContent{position:absolute; top:0; left:0; z-index:1;}\');
        document.write(\'#divBorder{position:absolute; left:0px; top:0px; z-index:2; width:355; height:295; background-image: url(pics/borders/blue.gif); layer-background-image: url(pics/borders/blue.gif)}\');
        document.write(\'</style>\');
    } else {
        document.write(\'<style type=\"text/css\">\');
        document.write(\'#divUpControl{position:absolute; width:11; left:329; top:10; z-index:3; text-align: right}\');
        document.write(\'#divUpDownLine{position:absolute; width:1; left:334; top:24; height:247; z-index:3; text-align: right}\');
        document.write(\'#divDownControl{position:absolute; width:11; left:329; top:270; z-index:3; text-align: right}\');
        document.write(\'#divContainer{position:absolute; width:310; height:260; top:20; left:15; overflow:hidden; clip:rect(0,310,260,0); visibility:hidden; z-index:2;}\');
        document.write(\'#divContent{position:absolute; top:0; left:0; z-index:2;}\');
        document.write(\'#divBorder{position:absolute; left:6px; top:3px; z-index:1; width:350; height:290; background-image: url(pics/borders/blue_nn.gif); layer-background-image: url(pics/borders/blue_nn.gif)}\');
        document.write(\'</style>\');
    }
//-->
</script>