The Document Object Model is a platform- and language-neutral interface that will allow programs and scripts to dynamically access and update the content, structure and style of documents. The document can be further processed and the results of that processing can be incorporated back into the presented page.

you can use it as a web service.

there is certain informtaion provided by the payment gateway providers like paypal etc . You have to provide the information exactly in the format they want it .

DOM (Document Object Model) is a platform and language neutral interface that allows program & scripts to dynamically access & update the content, structure & style of the documents.