Results 21 - 25 of 461
30 Jan 2019 30 Jan 2019 0 Comments  679 Views
Here Mudassar Ahmed Khan has explained with an example, how to perform Alphabet validation i.e. allow only Letters (A-Z) using OnKeyPress event in JavaScript.

When User types in the TextBox, the text in the TextBox will be validated using OnKeyPress event handler in JavaScript and if the inputted character is not Alphabet i.e. Letters (A-Z), the error message will be displayed next to the TextBox.
29 Jan 2019 29 Jan 2019 0 Comments  475 Views
Here Mudassar Ahmed Khan has explained with an example, how to perform Numeric validation i.e. allow only Numbers (Digits) using OnKeyPress event in JavaScript.

When User types in the TextBox, the text in the TextBox will be validated using OnKeyPress event handler in JavaScript and if the inputted character is not Numeric i.e. Number (Digit), the error message will be displayed next to the TextBox.
29 Jan 2019 29 Jan 2019 0 Comments  584 Views
Here Mudassar Ahmed Khan has explained with an example, how to perform AlphaNumeric validation i.e. allow only Alphabets and Numbers using OnKeyPress event in JavaScript.

When User types in the TextBox, the text in the TextBox will be validated using OnKeyPress event handler in JavaScript and if the inputted character is not AlphaNumeric i.e. Alphabet or Number, the error message will be displayed next to the TextBox.
29 Jan 2019 29 Jan 2019 0 Comments  653 Views
Here Mudassar Ahmed Khan has explained with an example, how to allow only AlphaNumeric, Dot (Period) and Underscore characters in Username using JavaScript.

When the Submit Button is clicked, the Username in the TextBox will be validated using JavaScript and Regular Expression (Regex) and if the Username is invalid, the error message will be displayed next to the TextBox using JavaScript.
28 Jan 2019 28 Jan 2019 0 Comments  855 Views
Here Mudassar Ahmed Khan has explained with an example, how to perform Email validation using OnKeyPress event in JavaScript.

The OnKeyPress event does not update the value of the TextBox when accessed using JavaScript and hence OnKeyUp event handler will be used to validate Email Address dynamically when User types in the Email Address in the TextBox.
Results 21 - 25 of 461