Validating checkbox javascript

The first example shows how to validate a checkbox if nothing is checked.

only if user clicks button control whitout checking the checkbox.

(message saying you mush check one checkbox before deleting anyrow.) but in gridview i used the following line.

Most often, the purpose of data validation is to ensure correct user input.

Validation can be defined by many different methods, and deployed in many different ways.

HTML form and how to use Java Script to validate the form data by checking whether at least one option has been selected.

Remember, radio buttons are used when you want the user to select only one option or answer to a question, and checkboxes are used when you wish to allow the user to select more than one option (if more than one option is available).In the case of a checkbox multiple values can be selected so validation is done if none of the checkboxes are ticked.You can also validate by requiring the user to select a minimum of one value or two value according to your requirement.in aspx page In the Code Behind: Private Sub Page_Load(By Val sender As System. Format("return validate Check Boxes In Grid('');", Grid View1. Format("check All Check Boxes In Grid('');", Grid View1. Change the validation function to this: function validate Check Boxes In Grid(grid Id) { var grid Ref = Element By Id(grid Id); if ( grid Ref == null ) return; var element Array = grid Elements By Tag Name('input'); for (var i=0; i Hi.

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