finding cursor position

[bahy]

in the name of GOD, hi


i'm creating a BB Code Editor,
I desined a button which when user click on it, it add some text in a textarea (for example by "body" name)
my codes say it which :
add text to the end of textarea, my code is this :
function insert_code(){
document.getElementById("body").value=document.get ElementById("body").value+'[ bold ] [ / bold ]';
}
but I want which this code add to the point which cursor in there.
not to the end of it.
If you help me I thank you !

[bahy]

oh, plz help me

[Ryan Fait]

Sorry, but I truly don't understand what you are asking

[bahy]

look
i want design a button which when you click on it add some text such az "[bold][/bold]" in a textarea and where which cursor is there.

[bahy]

plz help me (((((((((