使用Javascript提交价值

I'm a stuck with the following function:

<script type="text/javascript">
function removeElement($parentDiv, $childDiv){


     if (document.getElementById($childDiv)) {    
          var child = document.getElementById($childDiv);
          var parent = document.getElementById($parentDiv);
          parent.removeChild($child);
     }
}
</script>

<a href=\"javascript:;\" onClick=\"removeElement('$parent','$child');\">x</a>

This function deletes a child element, and its content, which works great client-side! But I am wanting to pass a value to the server, in the same instance, so the content of the element can be deleted from the mysql database too. I have no idea how to do this, so any suggestions will be very appreciated!

Notes: $child, and $parent are strings generated within the php file, that I use to give each element a unique ID.

Lets say I want to delete an entity using a ID

JQUERY - $.post() This is an easy way to send a simple POST request to a server without having to use the more complex $.ajax function. It allows a single callback function to be specified that will be executed when the request is complete (and only if the response has a successful response code). Jquery post docs

On the server assuming you have an open database connection.

mysql_query("DELETE FROM TABLE WHERE ID = ".$_POST['ID']);

more on mysql_query found here

EDIT:

So the following will only remove the element when the ajax post is complete. Note the first arg is the url to the script that will take the action , second is the data to be sent, in this case the ID post value will be {child.id} and the third is a anon inline callback function that will take action to remove the element client side.

<script type="text/javascript">
function removeElement($parentDiv, $childDiv){
if (document.getElementById($childDiv)) {
          var child = document.getElementById($childDiv);
          var parent = document.getElementById($parentDiv);  
          $.post('{URLTOSCRIPT}', 'ID=$child.id',function () { parent.removeChild($child); });

}}
</script>

To make your life easier, use jQuery or similar framework. Here's how you would do it in jQuery:

$(function() {
    $('.delete').click(function() {
        var link = $(this);
        var id = link.attr('id').replace('element_', '');
        $.ajax({
            url: 'handler.php',
            data: {
                element: id
            },
            type: 'post',
            success: function() {
                link.remove();
                // Or link.closest('tr').remove() if you want to remove a table row where this link is
            }
        });
        return false;
    });
});

The HTML:

<a href="#" class="delete" id="element_20">Remove</a>

And handler.php:

mysql_query("DELETE FROM `table` WHERE id = '".mysql_real_escape_string($_POST['element'])."'");

Always remember to escape database input!

If you're a total noob as you said, you probably won't understand all of this so I suggest you read something about jQuery's AJAX capabilities and about overall development using jQuery or similar JavaScript framework.

When you call the function, you'd want to put your PHP variables in tags like so:

<?php echo $parent; ?>

and

<?php echo $child; ?>

In the function definition, you will want to get rid of the PHP style variables and use something like:

function removeElement(parentDiv, childDiv) { //CODE }