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vikaspa

validate atleast one check box is checked ....

in Getting Started • 5 years ago

I have 4 check boxes

that are dynamically generated

<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td width="26%"><input name="membercategory[]" type="checkbox" id="membercategory[]" value="1" />
Life Membership </td>
<td width="26%"><input name="membercategory[]" type="checkbox" id="membercategory[]" value="2" />
Donor Member </td>
</tr>
<tr>
<td width="26%"><input name="membercategory[]" type="checkbox" id="membercategory[]" value="3" />
Well-Wisher </td>
<td width="26%"><input name="membercategory[]" type="checkbox" id="membercategory[]" value="4" />
Petron Member </td>
</tr>
</tbody>
</table>

I wish to validate at least one check box is clicked

for single checkbox

I am using following following javascript code .............. the checkbox name is 'terms'

if (!document.form1.terms.checked)
{
alertMsg += " - " + "Please Accept Terms and conditions " + "\n";
}

Since number of check boxes are dynamic I cannot use and/or conditions

pls help

Replies(4)

jakecigar

Re: validate atleast one check box is checked ....

5 years ago

Your IDs are duplicate, so they are worthless.

var checked = $("[name='membercategory\[\]']:checked")

gives you the number of checked boxed with the name membercategory[].

http://jsfiddle.net/jakecigar/q2huayta/ <--

Do you really want people to check multiple boxes? Radio buttons seem more logical.

JΛ̊KE

watusiware

Re: validate atleast one check box is checked ....

5 years ago

I have 4 check boxes

Since number of check boxes are dynamic

Which is it? Four? Or some arbitrary quantity?

Do you really want people to check multiple boxes?

I'd question that as well. This seems a sign-up for membership. It's normal to choose exactly one level of membership. It would be a very odd arrangement to be able to choose more than one!

As Jake suggests, a set of radio buttons would be more appropriate.

Start by choosing the appropriate type of input. Can you clarify your intent?

Since number of check boxes are dynamic I cannot use and/or conditions

You could use and/or conditions if you loop over your n check-boxes. But Jake has provided a neater solution, if you really need to know how many checkboxes are checked.

But doubt that check-boxes really make sense here. Maybe you prefer the look of the check-boxes, and if that's the case, it could be done, but bear it mind it will likely confuse your users, because they will be used to seeing radio buttons for mutually-exclusive selections.

vikaspa