Javascript posting multiple times - php

Question

I have a javascript coding that pulls a PHP file, and if it updates the database, it will echo Success: Age Updated! It works and all, But When I click it multiple times it will start to do this.. Sucsess: Age Changed! Sucsess: Age Changed! Sucsess: Age Changed! .. Here's the Javascript.
function UpdateAge(Age) {
var newage = $("#NewAge").val();
var dataString = 'newage=' + newage;
if (newage.length < 2) {
$('#Required').fadeIn(300);
$('#Mask').fadeIn(300);
} else {
$.ajax({
type: "POST",
url: "update_age.php",
data: dataString,
cache: false,
success: function (updateage) {
$("#UpdatedAge").append(updateage);
$("#UpdatedAge").show().fadeOut(1200);
}
});
}
}
How would I get it to just display Success: Age Updated! once, instead of it just multiplying everytime I click?
Here's the Button for the onClick
<input type="submit" value="Update" onClick="UpdateAge(<?php echo $age ?>)" />

Answer 1

Looks like you just need to empty your #UpdatedAge Element each time.
function UpdateAge(Age) {
var newage = $("#NewAge").val();
var dataString = 'newage=' + newage;
if (newage.length < 2) {
$('#Required').fadeIn(300);
$('#Mask').fadeIn(300);
} else {
$.ajax({
type: "POST",
url: "update_age.php",
data: dataString,
cache: false,
success: function (updateage) {
$("#UpdatedAge").empty();
$("#UpdatedAge").append(updateage);
$("#UpdatedAge").show().fadeOut(1200);
}
});
}
}

Answer 2

the problem is you keep appending, change the content instead (just change append to html)
$("#UpdatedAge").html(updateage);

Answer 3

Just use something as
function UpdateAge(Age) {
var newage = $("#NewAge").val();
var dataString = 'newage=' + newage;
if (newage.length < 2) {
$('#Required').fadeIn(300);
$('#Mask').fadeIn(300);
} else {
$.ajax({
type: "POST",
url: "update_age.php",
data: dataString,
cache: false,
success: function (updateage) {
$("#UpdatedAge").html(updateage);
$("#UpdatedAge").show().fadeOut(1200);
}
});
}
}
As .html replaces the content of #UpdatedAge and don't append it to the content, as .append does.