Here you can see screen captures from Firefox and Chrome: Text alert messages are generated entirely by the browser and will even translate automatically into different languages - something that would be almost impossible using just Java Script.
The advantage for the user is that it's obvious whick element is causing the problem and there's no alert window that needs to be clicked away.
All you need to do is include a This tells the browser that the form should not be allowed to submit without the checkbox checked.
If an exception is returned then Display a message : u201CCorrespondence Bank information is incomplete End.
After clicking on button, control should go to Step 5, so that the user can re-edit 718 records.
I usually work with PHP so sadly don't have some basic JS principles down.
This is all I want to accomplish--I've seen many posts on this topic but they are usually beyond what I need.
By default, clicking a Check Box control does not cause page validation.
To perform page validation when the Check Box control is clicked, set the property to specify the name of the validation group for which the Check Box control causes validation.Now, if you want to check whether the checkbox was checked within your php script upon submission, you do it like this: Now, how can that be exact same code?Pay close attention to "name" in your example and my example. My code is working great now, but once my page initially loads, the error for my checkbox shows. $agree = filter_input(INPUT_POST, 'term');$checked = ''; if( empty($agree) ) $errors['check'] = true;else Could anyone help me only show the error message when not checked and submitted.? I think, java script is best suited technique for check box validation because java script works on client machine side server load will be best option is java script. When I copied and pasted your code into a html file and ran it, my FF and IE spat out an error.If you put an alert() inside and just below your IF block I think you'll find the alert() inside the IF block will never be executed, hence your form is always submitted whether you check any boxes or not.Using vanilla Java Script we can prevent form submission as follows: All this does is confirm before submitting the form that the checkbox is checked.