張凡文

<form name="form-setusername" id="form-setusername" >
<input type="text" id="username" name="username" rows="1" />
<span id="text_username"></span>
<input type="submit" name="submit" id="submit" data-url="change_userinfo.php">
</form>

<script type="text/javascript" src="js/jquery-1.10.2.min.js"></script>
<script type="text/javascript" src="js/afs.js"></script>
<script>

function beforepost(targetform) {
if ($('#username').val().length==0) {
alertMessage("用戶名不能為空","error");
return false;
}    
return true;
}
function afterpost(retdata) {
$('#text_username').html(retdata.data.username);
}

$(function(){
localStorage.isSubmiting = 0;
$('#form-setusername input[type="submit"]').on("click", {
target: "#form-setusername",
beforepost: "beforepost",
afterpost: "afterpost",
}, ajaxFormSubmit);

}); 

</script>