While using Java Script for these purposes is a pretty good solution, it's not without its problems: The good news is that these dark days of Java Script-laden Web forms may soon be coming to an end.Thanks to the joys of HTML5, we can now create forms with built-in validation and rich widgets for dates, numbers and so on, all without including a single line of Java Script code. As with most cutting-edge Web stuff, there's a catch to all this, and that is browser support (or lack of it).This routine DOES NOT check that the date or time input values are valid, just that they match the required format (d/m/y and h:m). Once you're in control of the input format, it's a lot easier to check that the values are actually valid.
The expressions use a pre-defined class is returned which enables the form to be submitted.
You can play with the form now by trying out the demo.
Fill in a couple of fields, then click "Place Your Order" to see the validation kick in. First we'll create the basic skeleton markup for the page and form: field; however, HTML5-aware browsers will validate the field automatically, ensuring that the user enters a valid email address.
ABA (American Banker's Association) routing numbers are used to identify financial institutions when making transactions.
This number is usually required when setting up a bank account for direct deposits, automated payments, etc.