Setting jQuery attribute for font-weight

Question

I am trying to change the font-weight of an element. I tried with the following but it doesn't seem to work:

$("#opt_" + i).attr("font-weight", "bold");

Also what's the difference between prop and attr? Is that something to do with my problem?

Answer 1

use the .css() function instead of .attr()

$("#opt_" + i).css("font-weight", "bold")

Answer 2

It's not an attribute, but CSS:

$("#opt_" + i).css("font-weight", "bold");

example: http://jsfiddle.net/niklasvh/ENwbn/

Answer 3

$("#opt_" + i).style("font-weight", "bold");