Uses JQuery to count letters on a TextArea

TextAreaMessageCounter.js

var messageCount=0;

$(document).ready(onReady);

function onReady(){
    $("input").powerTip({placement:'n'});
    $("textarea").powerTip({placement:'n'});
    $("textarea").keyup(function(){
        if(messageCount < 160){
            messageCount = $(this).val().length;
            $("#textareacounter").html("Counter:"+messageCount);
        }
    });
}

$("#reset").click(function(){
    $("#textareacounter").html("Counter:0");
    messageCount = 0;
});