Validating a form using java script
This is very poor usability, and directly contravenes accessibility guidelines.What we’re going to do in this article is far less intrusive.] @[a-z A-Z0-9.] .[a-z A-Z0-9]$/ The expression checks the letters, numbers, and other symbol at a proper sequence.The sequence is defined as: [alphabets/numbers/underscore/plus [email protected]/numbers/periods.domain name] If the entered email address is not in a proper sequence, then the message will popup which says “Wrong Email Address”.Once we’ve got those utilities we can define the main validation function, which tests the field and then performs the actual validation, if applicable: attribute to indicate that state – adding it to an invalid field that doesn’t already have it, or removing it from a valid field that does. Finally, to put this all into action, we need to bind the validation function to an .We could just choose to ignore those browsers, but I think that would be a shame, especially when the problem is so simple to workaround.To check, whether the user entered correct form of data, it’s must to apply form validation in any of the form. The expression is: /^[a-z A-Z] $/ The above expression checks whether the input characters in the string is alphabet or not.
If an user miss out any field, than the form will display error message.Now that we have the static code, we can add the scripting.The first thing we’ll need is a basic property (the dot property only matches states which are set through scripting).It’s not even full client-side validation – it’s just a subtle usability enhancement, implemented in an accessible way, which (as I discovered while testing the script) is almost identical to something that Firefox now does natively!then the field will show a red outline, as illustrated by the following figure. If it did, then every required field would have that outline by default.function input Alphabet(inputtext, alert Msg) // Function that checks whether input text includes alphabetic and numeric characters.function text Alphanumeric(inputtext, alert Msg) // Function that checks whether the input characters are restricted according to defined by user.So, just to make sure that user entered the email address in the correct format, it’s necessary to include email validation code inside the validation codes.A general expression to check valid email address is: /^[w-.function form Validation() // Function that checks whether input text is numeric or not.function text Numeric(inputtext, alert Msg) // Function that checks whether input text is an alphabetic character or not.