javascrip 背景顏色變化及如何跨遊覽器

[uetchkimo]

執行的時候背景色一直都是全部白色的，不知道要在那加或者改寫背景色，因為我改寫後~~反而畫面什麼東西都沒有，請教各位大大，要在哪裡改背景色?
此程式只能在IE上執行，如果想要跨到Mozilla Firefox反而不執行，這要加上啥東西才可以執行呢??

// ColorTabStrip Version:1.0 ;Author:linss<linss@ms1.url.com.tw> ;Release:2002/1/10
function loadtab(n){

var BodyHeight=BoxHeight-24
var BodyWidth =BoxWidth-6
var TabBlank = BoxWidth
var TabBuilder="<table border=\"0\" cellpadding=\"0\" cellspacing=\"1\"><tr>";
for(var i=0;i<MyTabs.length;i++){
var TabText = (MyTabs[i][0].replace(/^[\s]+/g,"")).replace(/[\s]+$/g,"");
var TabWidth = (MyTabs[i][1].replace(/^[\s]+/g,"")).replace(/[\s]+$/g,"");
var TabLight = (MyTabs[i][2].replace(/^[\s]+/g,"")).replace(/[\s]+$/g,"");
var TabDark = (MyTabs[i][3].replace(/^[\s]+/g,"")).replace(/[\s]+$/g,"");
var TabAlign = (MyTabs[i][4].replace(/^[\s]+/g,"")).replace(/[\s]+$/g,"");
var TabIndex = (i-n==0)?1:0
var TabHeight="23"
var TabVAlign="middle"
TabColor=(i==n)?TabLight:TabDark
if(i==n){BodyColor=TabColor;TabHeight="24";TabVAlign="bottom"}
TabBlank = eval("TabBlank-TabWidth");
TabBuilder=TabBuilder+"<td rowspan=2 height=\"25\" width=\""+TabWidth+"\" align=right valign=\""+TabVAlign+"\" bgcolor="+BorderColor+">";
TabBuilder=TabBuilder+"<table border=0 cellpadding=0 cellspacing=0 width=\""+(TabWidth-1)+"\" height=\""+TabHeight+"\" bgcolor=\""+TabColor+"\"><tr>";
TabBuilder=TabBuilder+"<td><a href=\"javascript:loadtab("+i+");\" class=\"TabColor"+TabIndex+"\">";
TabBuilder=TabBuilder+"<div class=\"TabLabel"+TabIndex+"\" onclick=\"javascript:loadtab("+i+");\" style=\"text-align:"+TabAlign+";\">"+TabText+"</div>";
TabBuilder=TabBuilder+"</a></td></tr></table></td>";
}
TabStat2 = (MyTabs.length-1==n)?1:0
TabBuilder=TabBuilder+"<td width=\"1\" bgcolor=\""+BorderColor+"\" rowspan=\"2\"></td>";
TabBuilder=TabBuilder+"<td width=\""+(TabBlank-1)+"\" height=\"24\"></td></tr><tr>";
TabBuilder=TabBuilder+"<td height=\"1\" bgcolor=\""+BorderColor+"\"></td><tr>";
TabBuilder=TabBuilder+"<td width=\""+BoxWidth+"\" height=\""+BodyHeight+"\" colspan=\""+(MyTabs.length+2)+"\" align=\"center\" valign=\"top\" bgcolor=\""+BorderColor+"\">";
TabBuilder=TabBuilder+"<table border=\"2\" cellpadding=\"2\" cellspacing=\"2\" width=\""+(BoxWidth-2)+"\" height=\""+(BodyHeight-1)+"\" bgcolor=\""+BodyColor+"\"><tr>";
TabBuilder=TabBuilder+"<td><div class=\"TabBody\">"+MyMsgs[n]+"</div></td></tr></table></td></tr></table>";
if(document.all){
TabIE.innerHTML=TabBuilder;
}else{
with(document.TabNC.document){
open();
document.write(TabBuilder);
close();
}
}
}

[Force[TW]]

用 google 可以找到很多關於 firefox 對 javascript 不相容的資料，或是必須使用較為嚴格的寫法才能執行。