The problem is, how to compare the value that entered by the user and verify whether it is match or not?
A few months ago Sandeep introduced us to the HTML Constraint API, showing how we can use the new HTML5 input types and attributes to validate our forms in the browser with minimal Java Script.
Email validation checks the following points Figure 2: Above two figures are example of valid and invalid emails.
This is validation to check that entered values are all letters or combination of different chars.
But the great thing about them is that they all degrade gracefully.
So if an older browser doesn't support them, the fact that they're in the HTML won't 'break' anything, they’ll just be rendered as an .
Here, in this post I'll show you an example on how to enter only numbers or allow only numbers with a decimal in a textbox using Java Script. Ascci stands for “American Standard Code for Information Interchange”.
Let's walk through an example of how we can validate a form using only the browser's built in validation.The regex code accepts a phone number between 10-25 chars length.The chars can be numbers, parentheses(), hypens, periods & may contain sign in the beginning and can contain whitespaces in between.The valid phone numbers with the above regex validations are Hi. I have 2 input text where user must enter their phone number.Then if the phone number is match, it will go to other page, if not the user must re-enter the phone number.