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He is a published author on several subjects including XML, the migration from Visual Basic 6 to VB. In this scenario, if an error occurs while performing validation on the user's computer, the application can directly display the error message on the page that the user is viewing without the page making a round trip to the Web server and then back to the user.

NET, data validation was performed through scripts using either Java Script or VBScript.

[a-z] : It matches characters from lowercase ‘a’ to lowercase ‘z’. If by mistake, user skips entering any detail, soon the alert message appear on the form.

validating data javascript-7

By combining the expression for numbers and alphabetic characters, there is an expression that checks, whether the entered things includes numbers and alphabetic character or not.

The expression for matching numbers and characters in the field is: /^[0-9a-z A-Z] $/ It’s must to provide validation in the select field.

function length Define(inputtext, min, max) // Function that checks whether a option is selected from the selector and if it's not it displays an alert message.

function true Selection(inputtext, alert Msg) // Function that checks whether an user entered valid email address or not and displays alert message on wrong email address format.

function input Alphabet(inputtext, alert Msg) // Function that checks whether input text includes alphabetic and numeric characters.

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