Validating form field

Otherwise your application needs to provide this function.Passwords need to be stored encrypted in the database or elsewhere and any backups should also be encrypted.Some common restrictions are: Leaving the last requirement for now, as it requires a server-side script, let's see what's possible using just client-side HTML and Java Script.While having a strong password is a good first step, it needs to be backed up by additional measures on the server that prevent brute-force attacks.The best thing about HTML5 attributes is that they have no effect whatsoever on unsupported browsers, so older versions of Internet Explorer will act as if they are not present and just run the Java Script validation as before.At this stage both Firefox and Opera enforce HTML5 validation attributes in the browser while Safari only lets you use them with Java Script or for CSS effects.Another method is to display what they've entered as part of a 'confirmation page'.

Here are some simple steps to make the process more secure.The red/green markers have been implemented using CSS: In this example it should be clear to the user that the form can only be submitted once all three green ticks appear.In any case browsers such as Firefox and Opera will enforce the HTML5 validation rules and present messages as shown here: Presumably the browser messages will change according to the users language - something that would never be possible using only Java Script.In most browsers - those that support Java Script 1.5 (Firefox, Chrome, Safari, Opera 7 and Internet Explorer 8 and higher) - you can use more powerful regular expressions. The code presented above is fine in that it checks everything that we wanted to check, but uses a lot of code to test each requirement individually and present different error messages.We're going to show you now how to apply the password tests using a single regular expression.

Search for validating form field:

validating form field-71validating form field-85validating form field-69validating form field-54

Leave a Reply

Your email address will not be published. Required fields are marked *

One thought on “validating form field”