[jQuery] retrieving textnode?

[jQuery] retrieving textnode?

Hi, I'm new to jQuery, finding feet.
I want to be able to say, "if the text node of a certain child
consists of certain string, do this with its css".
Gotten as far as changing the css of all the children, thus:
$
document
.ready
function
{
$
"div > p::nth-child
6
.css
"color", "red"
;
}
;
but
$
document
.ready
function
{
$
"div > p::nth-child
6
.textNode
"_ _"
.css
"color", "red"
;
}
;
doesn't do it. Nor does textNode=...
Second question, Firefox error console isn't muchhelp in interpreting
the error. Any suggestion for debugging?