how to upload the images using ajax in button on click listener in php without form submit

Question

html:

<input type="file" onChange="readURL(this,'#Image2N');"  name="txtImage2N" id="txtImage2N" value="<?php echo $Image2N;?>">

javascript

$('#txtImage2N').on("change", function() {

    var data = new FormData();
    $.ajax({
           url: 'load.php', 
           type: 'POST',
           contentType: false,
           data: data,
           processData: false,
           cache: false
    })
 });