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Multi-Select List Box





Is there a way to put a limit to the number of items that can be selected in a list box? 

I have a list box in an update form. It is not for search purposes, rather for adding values to a data base.


Any help or attention will be greatly appreciated. 





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Hi Elena,


I think, you can use the following script, if it works for you:

function check_listbox() {
var the_listbox = document.getElementById("EditRecordFIELDNAME");
var max_number = 3;
var checked = 0;
for (var i=0 ; i < the_listbox.options.length; i++ ) 
   if (the_listbox.options[i].selected) {checked++;}
   if (checked > max_number)
      alert("The maximum of choices is 3!");
      return false;
document.getElementById("caspioform").onsubmit = check_listbox;

Please, enter the name of your field instead of FIELDNAME; enter your maximum number and your message.


The script will not allow to save the record, if a user selects too many items.


I hope, it helps.

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