Submit Adding Back In Checkboxes That Were Unchecked In Javascript

The following script is supposed to have high categories as radio buttons and mid categories as check boxes. Clicking the radio button is supposed to select all checkboxes under it and submit the form.

RADIO (ID = 0001-1 VALUE="")
CHECK (ID=0001-0011)
CHECK (ID=0001-0012)
RADIO (ID = 0001-2 VALUE="")
CHECK (ID=0001-0021)
CHECK (ID=0001-0022)

The code appears to be checking and unchecking the correct checkboxes. But when the submit occurs, the buttons that were unchecked become checked again.


function handleHighCatSelect(obj)
{
var highCatName = obj.name;
var highCatNameInMidCat = highCatName.substring(0,5) + "00" +
highCatName.substring(5,6);
alert(highCatName);
var length = document.frm.elements.length;
for (var i=0;i<length;i++)
{
var formObj = document.basicSearchMFSFrm.elements[i];
var currName = formObj.name;
var currValue = formObj.value;

if ((formObj.type == 'radio' || formObj.type == 'checkbox')
&& (currName.indexOf(&#55612;&#57201;-') != -1) )
{
if ((currName.indexOf(highCatNameInMidCat) != -1) ||
(currName == highCatName ) )
{
formObj.checked = true;
}
else
{
formObj.checked = false;
}
}
}
frm.submit();
}