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TOPIC: checkbox selection limit

checkbox selection limit 9 years 6 months ago #32916

  • jason35
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Need help please.
Could anyone tell me if there is a way to limit the number of checkbox selections as the form is being completed. i.e. if you are filling out the form and there are 10 checkboxes (and the limit is 3) you select 3 and a 4th cannot be selected until you uncheck one of the previous 3.

Thanks :)
Jason
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checkbox selection limit 9 years 6 months ago #32921

  • alexp
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Perhaps a forum search would help:

https://www.rsjoomla.com/forum/37-rsform-pro/16825-limit-the-number-of-checkboxes-checked-or-warning.html#16850
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checkbox selection limit 9 years 5 months ago #33065

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I did a search but didn't find anything that worked like I need it to

Can anyone help
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checkbox selection limit 9 years 5 months ago #33066

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Did you check the provided forum post ?
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checkbox selection limit 9 years 5 months ago #33073

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I did try it but it only validates when the user submits the form. I found that I need some java code to do it as the user completes the form but I am struggling to modify it to recognize the checkbox in the form.
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checkbox selection limit 9 years 5 months ago #33082

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So is seems I need an "onclick function" in the additional attributes but for the ;ife of me cannot get it to limit the number of checkboxes selected

Any help please
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checkbox selection limit 9 years 5 months ago #33084

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Can you post an URL to your form so we can have a look ?
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checkbox selection limit 9 years 5 months ago #33085

  • adrianp
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Hello,

You can try using the following JavaScript (while editing a form > Properties > CSS and JavaScript > JavaScript), including the <script> tags:
<script type="text/javascript">
function limitCheck(val,name,limit){
	var checkElement = document.getElementsByName(name);
	var counter = 0;
	for(var i=0; i < checkElement.length; i++){
		if(checkElement[i].value != val && checkElement[i].checked === true){
			counter++;
		}
		if(checkElement[i].value == val){
			var actualSel = checkElement[i];
		}
	}
	if(counter >= limit){
		actualSel.checked = false;
	}
}
</script>

Finally, add the following trigger on your checkbox element (edit the checkbox > Attributes > "Additional Attributes" area):
onclick="limitCheck(this.value,this.name,3);"

Whereas 3 is the limit you want to impose.
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Last Edit: 9 years 5 months ago by adrianp. Reason: Improved
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checkbox selection limit 9 years 5 months ago #33093

  • jason35
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Thank you so much Adrianp, works perfectly. You my friend have saved me from tearing my hair out. B) B) B)
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