IE vs NN

blow mentioned script is perfectly working in the IE, but the same script is not working in tne NN? why?

<script language="javascript">
<!-- hide jscript from old browsers
/****** this object holds all of the key data **********/
function Link(name, url){
this.name = name;
this.title = new Array();
this.url = new Array();
}
/**************************************************************/
var names = new Array ();
var temp = new Array ();
var temp2 = new Array ();
var link = new Link ();
var final_list = new Array ();
/******** array declaration... it holds all of the data for the menus ****/

/******** array declaration... it holds all of the data for the menus ****/
var menu = new Array (

"Select any*|Select any",

"Advertising*|Art Director#" +
"|Brodcast Manager#" +
"|Copy Writer#" +
"|Creative Director#" +
"|Logo Designer#" +
"|Market Research Executive#" +
"|Modeller#" +
"|Public Relation Officer#" +
"|Script Writer#" +
"|General",
"Civil*|Architect#" +
"|Civil Engineering Consultant#" +
"|Site Engineer#" +
"|Structural Engineer#" +
"|General",


"Computers/Software Development/EDP/Internet*|Customer Care#" +
"|Data Entry Operator#" +

"|Data WareHousing#"+
"|Database Administrator( ORACLE , SYBASE , DB2 , SQL SERVER,...)#" +
"|Development (C , C++ , VC++ , JAVA,...)#" +
"|ERP ( Bann , Marshall , Oracle , People Soft , SAP,...)#" +
"|Graphic Designer#" +
"|Networking Engineer#" +
"|Networking Manager#" +
"|Project Leader#" +
"|Project Manager#" +
"|Multimedia Designer#" +
"|Service Engineer#" +

"|System Analyst#" +
"|Technical Suppot Executive#" +
"|General",


"Electrical*|Configuration Analyst#" +
"|Controlled System Engineer#"+
"|Device Driver Devloper#"+
"|Equipment Maintanance Technician#"+
"|Electrical Engineer#"+
"|Process Enginerer#"+
"|Quality Control Inspector / Engineer#"+
"|General",

"Electronics*|Fo#" +
"|Device Driver Specialist#"+
"|Hardware Engineer#"+
"|PCB Designer#"+
"|Musical Instruments#"+
"|Quality Control Inspector / Engineer#"+
"|General",




"Law*|Civil#" +
"|Criminal#" +
"|Tax#" +
"|Pottery#" +
"|Handicrafts#"+
"|Others",
"Medical*|Anaesthesiology Consultant#" +
"|Cardiology Consultant#" +
"|Childrens Consultant#"+
"|Dental Consultant#" +
"|Dermatology Consultant#" +
"|Endocrenology cosultant#" +
"|E.N.T. Consultant#"+
"|Gastroenterology cosultant#" +
"|General cosultant#" +
"|Geriatrics cosultant#" +
"|Gerontology cosultant#" +
"|Hematology cosultant#" +
"|Homeopathy Consultant#"+
"|Immunology cosultant#" +
"|Maternity Consultant#"+
"|Orthopedics Consultant#"+
"|Pediatrics Consultant#"+
"|Radiology Consultant#"+
"|Siddha Consultant#" +
"|Surgery Consultant#"+
"|Homeopathy Consultant#"+
"|Urology Consultant#"+
"|Childrens Consultant#"+
"|Others",
"Teaching*|College Lecturer#" +
"|Computer Teacher#" +
"|Dance Teacher#" +
"|Faculitie#" +
"|High School Teacher#" +
"|Primary School Teacher#" +
"|School Teacher ( ANGLO-INDIAN )#" +
"|School Teacher ( CBSC )#" +
"|School Teacher ( MATRIC)#" +
"|Tuction Teacher#" +
"|Vocal Tutor#" +
"|General",
"Marketing*|Business Development Executive#" +
"|Chief Marketing Executive#"+
"|Marketing Manager#" +
"|Sales Executive#"+
"|Sales Representative#"+
"|Senior Sales Executive#"+
"|General",
"Mechanical*|Cane#" +
"|Fibre#"+
"|Plastic#" +
"|Steel#"+
"|Fibre#"+
"|General",
"Sales*|Action Figures#" +
"|Building sets#"+
"|Cards#"+
"|Cars and Vehicles#"+
"|Decoratives#" +
"|Dolls#"+
"|Stuffed Toys#"+
"|Video Games#"+
"|Others",
"Hobbies and Collections*|Cards#" +
"|Celebrity pictures#"+
"|Coins#"+
"|Stamps#"+
"|Vintage Cars#" +
"|Others",
"Household Appliances*|Air Conditioners#" +
"|Aircoolers#"+
"|Appliances#"+
"|Foodstuff#"+
"|Furnitures#" +
"|Microwave oven#"+
"|Refrigerators#"+
"|Tools#"+
"|Others",
"Jewellery and Jem stones*|Diamonds#" +
"|Gem stones#"+
"|Gold jewellery#"+
"|Pearls#"+
"|Silver#"+
"|Others",
"Musical Instruments*|Electronic Instruments#" +
"|String Instruments#"+
"|Wind Instruments#"+
"|Piano#"+
"|General",
"Photo and Electronic Goods*|Audio#" +
"|CDs#"+
"|Copiers#"+
"|Digital Organizers#"+
"|Fax#" +
"|Players-ACD and VCD#"+
"|Phones#"+
"|Photo Equipments#"+
"|Television#"+
"|Others",
"Property*|Lease#" +
"|Ownership#"+
"|Rent#"+
"|Sell#"+
"|General",
"Sports*|Base Ball#"+
"|Basket Ball#"+
"|Car Rally#" +
"|Cricket#"+
"|Hockey#"+
"|Volley Ball#"+
"|Water Games#" +
"|Others",
"Travel and Transport*|Holiday Packages#"+
"|Hotels#"+
"|Luggage#" +
"|Resorts#"+
"|Travel Tickets#"+
"|Vacation Rentals#"+
"|Others",
"Other Goods and Services*|Industrial Goods#"+
"|Office Products#"+
"|Pets#" +
"|Real Estate#"+
"|Services#"+
"|Stationery#"+
"|Others"
);
/*****************************************************************/
/*****************************************************************/
/*****************************************************************/

/*****************************************************************/
function stringSplit ( string, delimiter ) {
if ( string == null | | string == "" ) {
return null ;
} else if ( string.split != null ) {
return string.split ( delimiter ) ;
} else {
var ar = new Array() ;
var i = 0 ;
var start = 0 ;
while( start >= 0 && start < string.length ) {
var end = string.indexOf ( delimiter, start ) ;
if( end >= 0 ) {
ar[i++] = string.substring ( start, end ) ;
start = end+1 ;
} else {
ar[i++] = string.substring ( start, string.length ) ;
start = -1 ;
}
}
return ar ;
}
}
/**************************************************************/
function updateMenus ( what ) {
var n = what.selectedIndex;
//what.form.myLinks.length = final_list[n].title.length;
//what.ft.ffarea.length = final_list[n].title.length;
what.form.ffarea.length = final_list[n].title.length;


//for (var x = 0; x < what.form.myLinks.length; x++)
//for (var x = 0; x < what.ft.ffarea.length; x++)
for (var x = 0; x < what.form.ffarea.length; x++)

{
//what.form.myLinks.options[x].text = final_list[n].title[x];
//what.ft.ffarea.options[x].text = final_list[n].title[x];
what.form.ffarea.options[x].text = final_list[n].title[x];


//what.ft.myLinks.options[x].value = final_list[n].url[x];
//what.ft.ffarea.options[x].value = final_list[n].url[x];
what.form.ffarea.options[x].value = final_list[n].url[x];


}
//what.form.myLinks.selectedIndex = 0;
//what.ft.ffarea.selectedIndex = 0;
what.form.ffarea.selectedIndex = 0;



}
/**************************************************************/
function give_names () {
//document.myForm.main.length = names.length;
document.ft.findus.length = names.length;

//document.myForm.myLinks.length = final_list[0].title.length;
document.ft.ffarea.length = final_list[0].title.length;

for ( var i=0; i<names.length; i++ )
//document.myForm.main.options[i].text = final_list[i].name;
document.ft.findus.options[i].text = final_list[i].name;

for (var x=0; x<final_list[0].url.length; x++)
//document.myForm.myLinks.options[x].text = final_list[0].title[x];
document.ft.ffarea.options[x].text = final_list[0].title[x];

}
/**************************************************************/
function createMenus () {
for ( var i=0; i<menu.length; i++ ){
names[i] = stringSplit (menu[i], '*' );
link = new Link(names[i][0]);
temp[i] = stringSplit(names[i][1], '#');
final_list[i] = link;
for (var x=0; x<temp[i].length; x++){
temp2[x] = stringSplit( temp[i][x], '|' );
final_list[i].url[x] = temp2[x][0];
final_list[i].title[x] = temp2[x][1];
}
}
give_names();
}

/**************************************************************/
// end jscript hiding -->