How to check if one from a multiple list of checkboxes have been selected

@James_GatkaMar 24.2006 — #

[CODE]<html>
 <head>
 <script type="text/javascript">
 
  function verifyBoxes(nBox,nMin,nMax,nDesc){
 
   var nCount = 0;
   var nSet = document.getElementsByName(nBox);
   for (i=0; i<nSet.length; i++)
   {if (nSet[i].checked){nCount++}}
   if (nCount < nMin)
   {alert('A minimun of '+nMin+ ' is requirednfor '+nDesc);return false}
   if (nCount > nMax)
   {alert('A maximun of '+nMax+ ' is allowednfor '+nDesc);return false}
   return true;
  }
 
  function validate(nForm){
 
   if (!verifyBoxes('set1',1,4,'Magazines')){return false}
   if (!verifyBoxes('set2',1,1,'Books')){return false}
   alert('Thank you for your submission');
  }
 
 </script>
 </head>
 <body>
 <form onsubmit="return validate(this)">
 Magazines:<br>
 A: <input type='checkbox' name='set1'><br>
 B: <input type='checkbox' name='set1'><br>
 C: <input type='checkbox' name='set1'><br>
 D: <input type='checkbox' name='set1'><br>
 E: <input type='checkbox' name='set1'><br>
 F: <input type='checkbox' name='set1'><br>
 G: <input type='checkbox' name='set1'><br>
 H: <input type='checkbox' name='set1'><br>
 I: <input type='checkbox' name='set1'><br>
 J: <input type='checkbox' name='set1'><br>
 <br><br>
 Books:<br>
 K: <input type='checkbox' name='set2'><br>
 L: <input type='checkbox' name='set2'><br>
 M: <input type='checkbox' name='set2'><br>
 N: <input type='checkbox' name='set2'><br>
 O: <input type='checkbox' name='set2'><br>
 P: <input type='checkbox' name='set2'><br>
 Q: <input type='checkbox' name='set2'><br>
 R: <input type='checkbox' name='set2'><br>
 S: <input type='checkbox' name='set2'><br>
 T: <input type='checkbox' name='set2'><br>
 <br> 
 <input type='submit' name='submit' value='Submit'>
 </form>
 </body>
 </html>[/CODE]

@konithomimoMar 24.2006 — #

function checkAll()
 {
 var ins = document.getElementsByTagName('input');
 var i;
 for(i=0;i&lt;ins.length;i++)
 {
 if((ins[i].type=='checkbox')&amp;&amp;(ins[i].checked))
 return true
 }
 return false
 }

That will return true if at least one checkbox has been checked. If not then it returns false.

How to check if one from a multiple list of checkboxes have been selected

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How to check if one from a multiple list of checkboxes have been selected

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