function setOptions(o) 
{ 
var select2 = document.form1.select2; 
select2.options.length = 0; 
document.getElementById('select2div').style.display = 'inline';
document.getElementById('author_instructions').style.display = 'none';
if (o == "1") 
{ 
select2.options[select2.options.length] = new Option('Exact'); 
select2.options[select2.options.length] = new Option('Keyword'); 
select2.options[select2.options.length] = new Option('Starts_with');
} 
if (o == "2") 
{ 
select2.options[select2.options.length] = new Option('ISBN-13'); 
select2.options[select2.options.length] = new Option('ISBN-10');
} 
if (o == "3") 
{ 
//select2.options[select2.options.length] = new Option('Last name first:'); 
document.getElementById('select2div').style.display = 'none';
document.getElementById('author_instructions').style.display = 'inline';
} 
if (o == "4") 
{ 
select2.options[select2.options.length] = new Option('Antiques and Collectibles');
select2.options[select2.options.length] = new Option('Architecture');
select2.options[select2.options.length] = new Option('Art');  
select2.options[select2.options.length] = new Option('Biography and Autobiography');
select2.options[select2.options.length] = new Option('Business and Economics');
select2.options[select2.options.length] = new Option('Comics and Graphic Novels');  
select2.options[select2.options.length] = new Option('Computers');
select2.options[select2.options.length] = new Option('Cooking');
select2.options[select2.options.length] = new Option('Crafts and Hobbies');  
select2.options[select2.options.length] = new Option('Drama');
select2.options[select2.options.length] = new Option('Education');  
select2.options[select2.options.length] = new Option('Family and Relationships');  
select2.options[select2.options.length] = new Option('Fiction');
select2.options[select2.options.length] = new Option('Foreign Language Study');
select2.options[select2.options.length] = new Option('Games');
select2.options[select2.options.length] = new Option('Gardening');  
select2.options[select2.options.length] = new Option('Health and Fitness');  
select2.options[select2.options.length] = new Option('History');
select2.options[select2.options.length] = new Option('House and Home');  
select2.options[select2.options.length] = new Option('Humor');
select2.options[select2.options.length] = new Option('Juvenile Fiction');  
select2.options[select2.options.length] = new Option('Juvenile Nonfiction');  
select2.options[select2.options.length] = new Option('Language Arts and Disciplines');  
select2.options[select2.options.length] = new Option('Law');
select2.options[select2.options.length] = new Option('Literary Collections');  
select2.options[select2.options.length] = new Option('Literary Criticism');
select2.options[select2.options.length] = new Option('Mathematics');
select2.options[select2.options.length] = new Option('Medical');
select2.options[select2.options.length] = new Option('Music');
select2.options[select2.options.length] = new Option('Nature');
select2.options[select2.options.length] = new Option('Non-Classifiable');  
select2.options[select2.options.length] = new Option('Performing Arts');  
select2.options[select2.options.length] = new Option('Periodicals');  
select2.options[select2.options.length] = new Option('Pets');  
select2.options[select2.options.length] = new Option('Philosophy');  
select2.options[select2.options.length] = new Option('Photography');  
select2.options[select2.options.length] = new Option('Poetry');  
select2.options[select2.options.length] = new Option('Political Science');  
select2.options[select2.options.length] = new Option('Psychology');  
select2.options[select2.options.length] = new Option('Recorded Music');  
select2.options[select2.options.length] = new Option('Reference');  
select2.options[select2.options.length] = new Option('Religion');  
select2.options[select2.options.length] = new Option('Science');  
select2.options[select2.options.length] = new Option('Self-Help');  
select2.options[select2.options.length] = new Option('Social Science');  
select2.options[select2.options.length] = new Option('Sports and Recreation');  
select2.options[select2.options.length] = new Option('Study Aids');  
select2.options[select2.options.length] = new Option('Technology');  
select2.options[select2.options.length] = new Option('Transportation');  
select2.options[select2.options.length] = new Option('Travel');  
select2.options[select2.options.length] = new Option('True Crime');  
select2.options[select2.options.length] = new Option('Video and DVD Genre');  
} 
}