Validating registration forms using javascript

05 Nov

Either you can see the demo section or you may download the source code or can go through our tutorial which will demonstrate the scripts with example to understand it better.body, form, ul, li, p, h2, h3, h4, h5 body #signup img #signup p #signup h2 #signup #signup fieldset #signup ol #signup li #signup label legend #signup fieldset input,#signup fieldset select #signup fieldset textarea #signup fieldset input[type="checkbox"] #signup fieldset input[type="radio"] #signup fieldset select #signup fieldset #postcode #signup input::-webkit-input-placeholder,#signup input:-moz-placeholder input:placeholder #signup .validation01 #signup input:focus .validation01 #signup input:focus:required:invalid .validation01 .valid,#signup input.error:focus .validation01 .valid,#signup input.required:focus .validation01 .valid,#signup input:focus .validation01 .valid #signup input:focus:required:valid .validation01,#signup input.valid:focus .validation01 #signup input:focus:required:valid .validation01 .invalid,#signup input.valid:focus .validation01 .invalid #signup input:focus:required:valid .validation01 .valid,#signup input.valid:focus .validation01 .valid #signup fieldset input:required:valid #signup input.error #signup input.required #signup input.valid #signup input.error::-webkit-input-placeholder,#signup inputerror :-moz-placeholder input[type="submit"] var H5F = H5F

If you want to restrict the input of a text field to numbers without having the up/down arrows associated with the input box, you can always just set the input type to of "\d " (one or more numbers). So something along the line of [email protected] would be perfectly valid! Anyone out there know how to adjust the url validation so that it will accept inputs in the following format: no need to force a user to input or https:// You can find a comparison of some interesting regexes for validating URLs here.For validating a form, a library (H5F) has been introduced to giving better performance with HTML5.In this tutorial you will learn how you can validate your form with HTML5.While it would be great to see something like this in every browser, for now you probably need to stick with the ubiquitous Java Script plugins. Arjen, You're correct: and it's not just the plus sign ( ), although I have to admit, I've never seen that used in an email address before.While the code we're using is slightly more complicated, this should get you started: Some of the articles below, particularly the first two, provide other style/scripting options and solutions for supporting older browsers. Wikipedia has a list of potentially valid email formats here: en.wikipedia.org/wiki/Email_address#Valid_email_addresses Most browsers accept [email protected] as valid for email input as it can be technically correct in some situations - on an intranet for example. How do you only show the fields as 'invalid' after the user leaves (blurs? It's ugly to have ready icons displayed when the page loads.In other web browsers they can be used in combination with the .Obviously neither example is very limiting, but it will prevent people from entering completely wrong values, such as phone number, strings with multiple '@'s or spaces.Hopefully these behaviours will converge in future releases.For these examples we have created our own valid/invalid CSS formatting to override the browser default. That's why you may see something like the following: Before you type anything into the box a red marker is shown.We have a separate article with details on validating passwords using HTML5, including Java Script code for customising the browser generated alert messages. You just need to pick one and then remove the portion that detects the protocol (xxx://).Other HTML5 input types include: -related options do have an effect at least in Opera, with pop-up calendars and other devices appearing to assist with input. But as you see, lots of strange looking URLs are actually valid.