Comments on: Useful JavaScript: maxCheckbox

By: Adam Moro

Adam Moro — Fri, 23 May 2008 03:27:20 +0000

That’s the best news I’ve heard all year. Can’t wait.

By: Kevin Skoglund

Kevin Skoglund — Fri, 23 May 2008 02:58:10 +0000

Thanks, Adam! I have already started working on PHP Beyond the Basics as well as making some updates to the existing training videos. I’m glad to hear that they helped.

By: Adam Moro

Adam Moro — Fri, 23 May 2008 02:51:01 +0000

Hi Kevin, I’ve watched your PHP Essential Training Videos countless times and certainly will be watching them many times again. Firstly, thank you for making them. They’re absolutely flawless and I wouldn’t be where I am today had I not found them. Can’t wait utill I have the time to start the Ruby on Rails training which I notice has a Beyond the Basics edition as well. Do you plan to ever do something similar for PHP? I think it goes without saying you’d have at least one customer. Thanks again and sorry for using a comment to contact you (I couldn’t find a contact link/form anywhere).

By: Kevin Skoglund

Kevin Skoglund — Wed, 21 May 2008 17:24:19 +0000

Glen, what do you see as the advantage of your version?

I think the disadvantage would be that it doesn’t warn you until you submit the form. I think it is more elegant to handle it when the user is going through that area of the form instead of asking them to find and correct the checkboxes after the fact. Prevention vs. cure. But that may also just reflect a personal preference of mine.

By: Glen

Glen — Tue, 20 May 2008 13:08:50 +0000

Why not degrade gracefully, and use CSS classes, and a bit of Javascript? Here’s the code:

apple
maple
cinnamon

onsubmit for the form has this

function maximum(fObj, associatedNumber) {
	var theseCheckboxes = document.getElementsByName(fObj.name);
	var somethingChecked = 0;
	for(var theCheckbox = 0; theCheckbox  associatedNumber) {
		alert('You may check up to '+associatedNumber+' ' + checkboxes + '!');
		return false;
	}
}

Thoughts?