Using Ajax Wisely
Ajax is a set of technologies that is used to rewrite part of a web page without a complete page refresh. Jesse James Garret coined the term to describe a set of technologies currently coming into their own. This happens by using JavaScript to send a request to the server for information and then using DOM based JavaScript to rewrite a portion of the web page with the data that is returned.
Using this method allows for complex form validation while the user is filling out the form in stead of and in addition to validation following submission. This means that a user can enter their ZIP code for their shipping address and see the shipping charges added to the form before they move on or they can see that the username they want is already taken and have some suggestions shown to them as they type.
Continue reading Using Ajax Wisely