jQuery and Ajax

I do not know a lot about Ajax.  Can you use Ajax to save info to a DB table as someone fills out a form on a select option change?  If someone fills out an order form on my website, I want to store certain info about what they were filling out.  If they don't make a purchase, send them an email reminding them about the products they were about to order but did not.
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Yes.  But to be clear, the ajax request will just send the data to the server.  On the server you need a script that "receives" the data connects to the db and stores the data.  What are you using on the backend (PHP,JSP,ASP)?
Big MontyWeb Ninja at largeCommented:
here's a simple ajax script that sends back data to the server. as mentioned, you need a server side language to then process that data:

                    var data = {
                        mode: 'offer',
                        offerID: $('#hdnOfferID').val(),
                        offer: $('#txtOffer').val(),
                        active: $('#chkOfferActive').prop('checked'),
                        desc: $('#txtOfferDescription').val(),
                        categoryID: $('#selCategory').val()

                    type: "POST",
                    data: data,
                    url: url,
                    success: function (result) {
                        alert('Record updated successfully!');

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rgranlundAuthor Commented:
I'm going to use a PHP query to store a few form fields and I need to do it on a specific click.
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