String manipulation in jQuery

Never mind, I figured it out

if ($(header).text().trim().charAt(0) == "+")
    $(header).text($(header).text().replace("+", "-"));
else
    $(header).text($(header).text().replace("-", "+"));

If this is not the correct way, I'd appreciate a heads up

I would do:

var plus_string = "<span class=/"plus/">+</span>";
var minus_string = "<span class=/"minus/">-</span>";


if($("div.header").hasClass("plus")){
    $("div.header").removeClass("plus");
    $("div.header").addClass("minus");
    $("div.header").append(plus_string);
    $("span.plus").remove();
 } else (... the reverse of the above...)

This because i would use the class plus and minus to handle a bit of css to change the appearance of the header div. As you're probably already doing that, you can play a bit with it like this :)