I want to learn javascript......please tell me which one will serve me at best. first tell me about the free sites...later, lower costing.Bye.
if you are beginner then start with www.w3schools.com and then use google for particular functionality / concept learning. Best way to learn anything is to learn it in logical way while implementing it at its best
Start with www.w3schools.com and learn the basics of js. Then try to learn some most used js libraries like prototype, jquery etc...