Javascript array [] length is undefined when only single element

Okay kids. Here's another strange one. Very simple form. The array is dynamically generated from PHP as per the suggested method: http://us2.php.net/manual/en/faq.html.php#faq.html.arrays However, when there is only a single element, the myMultiSelect.length is undefined in javascript. If there are two or more elements, then the length works as expected... ---------------------- snip ---------------------- <SCRIPT> function checkAudits() { var theForm = document.AddSchedule; var myMultiSelect = theForm['RunVuln[]']; // this doesn't work either. //var a = document.forms[0].elements['RunVuln[]'].length; //alert("a: " + a); selectedAudits = 0; for(i = 0; i < myMultiSelect.length; i++) if (myMultiSelect[i].checked) selectedAudits++; alert("selectedAudits: "+selectedAudits+" myMultiSelect.length: "+myMultiSelect.length); if (selectedAudits < 1) { alert("You must select at least one."); return false; } return true; } </SCRIPT> <FORM ACTION="/poop.php" METHOD=POST NAME="AddSchedule"> <input type=checkbox name="RunVuln[]" value="foo"> foo <BR> <!-- uncomment this line and it works. with it commented, the length is undefined. WTF?! <input type=checkbox name="RunVuln[]" value="bar"> bar <BR> --> <INPUT TYPE=SUBMIT NAME=SUBMIT VALUE="Update Selections" onClick='return checkAudits();'> </FORM>