[jQuery] [jquery] Beginner's Question: How write text output that stays

[Beginner]

Hi, currently I write text like this:

$(document).ready(function(){
                $("#XXX").click(function(event){
document.write("TESTOUTPUT");
}});

Unfortunately the text "testoutput" will immediately disappear after
the click event passed. Is there a remedy for that? I need it to
appear after a click.