Populating sqldatabase fields to dropdown using javascript

Question

hi,
I have an application having more than 20 dropdowns and i m populating database fields to dropdownlist...the matter is when i want to enter the page having these dropdowns..it is taking so much time for page to start...
 
can any one suggest me how to make page to display very fast eventhough having many dropdowns with database fields
 
what m i thinking is to use javascript to populate database fields..so that performance may increase..what do you people think..
 
if my thinking seems to be right..can anyone tell me the code to use dropdown with javascript...