Then you have to select at least 4 features of the mobile phone.
After that you have to select the camera resolution from the third multiple select check box.
allows the user to select more than one item from the group.
In some cases you may want to use multiple check boxes to make some selections.
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In such situations you should validate check box-selections before submitting the form.
Use following multiple check box selection example to study the in Java Script. First you have to select at least 3 mobile phone manufactures from first check box group.
I am a software developer, working with various software languages and environments.
In this blog I will describe problems that I encountered during software development, and how I solved them, hoping to help all other developers encountering the same or similar problems. NET provides the validation controls that enables checking if the input is valid before starting to process in on the server and thus save time for the user. However when I tried to user a required field validator for a Checkbox List control, to make sure that the user selected at least one item, I got an exception, saying that the control to validate is invalid.
One last problem I had when developing this solution: When I only had the server-side validation method, things didn't work well, I could not see the error message and the operation wasn't stopped.
But of course I didn't want the user to see the dummy text box. When I did that, the validation method was never called. NET does not perform validation for a control whose visibility is false.