ช่วยดูโค้ด Jquery Post ให้ผมทีครับ มันไม่ยอมส่งค่าไป ดําเนินการครับ

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.0/jquery.min.js"></script>
<script type="text/javascript">
$(function() { 
    $('.button').click(function(){
        var name = $('#name').val();
        var catagories = $('#catagories').val();
        var img = $('#img').val();
        var desc = $('#desc').val();
        var data_string = 'name='+ name + '&catagories=' + catagories + '&img=' + img + '&desc=' + desc;
       
        $.ajax({
        type: "POST",
        url: "../core/function.php",
        data: data_string,
        success: function(data){
                //alert('SUCCESS');
                alert(data);
        }
        });
    });
});
</script>

<?php

print_r($_POST);

/*
include 'database.class.php';

if(isset($_POST["name"],$_POST["catagories"],$_POST["desc"])){
    $name = $_POST['name'];
    $catalog = $_POST['catagories'];
    $img = $_FILES["img"]["name"];
    $desc = $_POST['desc'];
    
    $datetime = date("Y-m-d H:i:s");
    
    $column = array('gl_name','gl_catagories','gl_img','gl_desc','gl_datetime');
    $values = array($name,$catalog,$img,$desc,$datetime);
    
    $conn = new Database;
    $conn->connect();
    $conn->insert('gellory',$values,$column);    
}else{
    
    echo "NO";
   
}

*/

?>

<form action="" method="post" enctype="multipart/form-data">
                  <div class="box">
                    <label>
                       <span>Full name</span>
                       <input type="text" class="input_text" name="name" id="name"/>
                    </label>
                     <label>
                       <span>Catagories</span>
                       <select name="catagories" class="input_text" id="catagories">
                        <option value="1">keng</option>
                       </select>
                    </label>
                     <label>
                        <span>Image</span>
                        <input type="file" class="input_img" name="img" id="img"/>
                    </label>
                    <label>
                        <span>Description</span>
                        <input type="text" class="input_text" name="desc" id="desc"/>
                    </label>
                    <label>
                        <input type="submit" class="button" name="insert" id="submit" value="Submit Form" />
                    </label>
                    
                    
                 </div>
            </form>

//jQuery
$(function() { 
    $('#frm1').submit(function(){
        var name = $('#name').val();
        var catagories = $('#catagories').val();
        var img = $('#img').val();
        var desc = $('#desc').val();
		$.post("post.php?"+Math.random(),{"name":name},function(data){
			alert(data);
		});
		return false;
    });
});

//form
<form action="#" method="post" enctype="multipart/form-data" id="frm1">
<input type="text" name="name" id="name"/>
<select name="catagories" id="catagories">
	<option value="1">keng1</option>
	<option value="2">keng2</option>
</select>
<input type="file" name="img" id="img"/>
<input type="text" name="desc" id="desc"/>
<input type="submit" name="insert" value="Submit Form" />

PHP
<?
/*Test*/
echo "name=".$_POST["name"];
/*do...*/
?>

<script type="text/javascript">
$(document).ready(function(){
$(".frm_new").validate();

$("#AddNew").on("click",function(){
	if( $(".frm_new").valid() === true ){
		var action = $("#frm_new").attr('action');
		var form_data = {
			FullName: $("#txtFullName").val(),
			UserName: $("#txtUserName").val(),
			Password: $("#txtPassword").val(),
			Email: $("#txtEmail").val(),
			is_status: 0
			};
			
			$.ajax({
			type: "POST",
			cache:false,			
			url: action,
			data: form_data,
			success: function(response){
				if(response == 'success'){
					alert("บันทึกข้อมูลเรียบร้อย");
					$("#ShowPage").load("admin-form.php");  
					}else{
						alert("เนื่องจากบันทึกข้อมูลไม่ครบ หรือ User Name และหรือ Password มีอยู่ในระบบ");
						}
				}
			});
			return false;
	}
		});

   
  });	
</script>