Here Mudassar Ahmed Khan has explained with an example, how to enable and disable a TextBox when DropDownList (HTML SELECT) is changed i.e. when an item (option) is selected using JavaScript and jQuery.

When the Other (option) in DropDownList is selected, the TextBox will be enabled else disabled.

Here Mudassar Ahmed Khan has explained with an example, how to enable and disable a TextBox when RadioButton is clicked i.e. checked (selected) and unchecked (deselected) using JavaScript and jQuery.

When the RadioButton is clicked based on whether the YES RadioButton is checked (selected) or unchecked (deselected), the TextBox will be enabled or disabled.

Here Mudassar Ahmed Khan has explained with an example, how to perform Form validation in AngularJS.

This article will illustrate how to perform Form Validation for TextBox INPUTS for validating Name, Email Address and Age, etc. on click of Submit Button in AngularJS.

Here Mudassar Ahmed Khan has explained with an example, how to perform Email Address validation inside Controller in AngularJS.

This article will illustrate how to use AngularJS Form Validation for TextBox and ng-pattern directive and Regular Expressions (Regex) for validating Email Address in AngularJS.

The Regular Expression for Email validation will be set inside Controller in AngularJS.