Escape square brackets when assigning a class name to an element

Question

Does anyone know how to escape the square bracket character when setting a class name with jQuery?

Try the following:

$(\'#txtFirstname\').addClass(\         


        

Answer 1

Escape with TWO (2) backslashes.

http://learn.jquery.com/using-jquery-core/faq/how-do-i-select-an-element-by-an-id-that-has-characters-used-in-css-notation/