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File upload in php Ajax jQuery not working
<table>
    <form name="profileimage" id="profileimage" method="post"  enctype="multipart/form-data" >
        <tr>
            <td><img id="partner_pic" src="" height="100" width="100" /></td>
        </tr>
        <tr>
            <td><input type="file" name="fileimg1" id="fileimg1" /></td>
        </tr>
        <tr>
            <td><p id="pic_profile_p"></p></td>
        </tr>
        <tr>
            <td><input type="submit" name="uploadimg" value="Change Picture" /></td>
        </tr>
    </form>

</table>

<?php
     $target = "upload/";
     $target = $target . $_FILES['fileimg1']['name'] ;
     $ok=1;
     if(move_uploaded_file($_FILES['fileimg1']['tmp_name'], $target))
     {
         echo "The file ". basename( $_FILES['uploadedfile']['name']). " has been uploaded";
     }
     else {
         echo "Sorry, there was a problem uploading your file. <br />" . $_FILES['fileimg1']['error'];

     }
?>

$("#profileimage").submit(function(){

        var data = $(this).serialize();
        $.post('ajx_upload.php', data, function(return_data){
            $('#pic_profile_p').html(return_data)
        });


        return false;
    });