Add Attribute to CheckBoxList ListItem at runtime?

[CK]

Hi All,
I have an asp:CheckBoxList. it is databound to a datatable at runtime;

private void chklstStatuses_DataBinding(object sender, EventArgs e)

{

chklstStatuses.DataSource = BillingInvoiceUtil.GetStatuses();

chklstStatuses.DataTextField = "StatusName";

chklstStatuses.DataValueField = "InvoiceStatusID";

}

I need to add an attribute to each list item,
"onClick=javascript:setFilter(this);"

I can not get it to work. I tried two different methods in two different
events, in chklstStatuses_DataBinding & in chklstStatuses_PreRender.

I try it like this

for(int x = 0; x != chklstStatuses.Items.Count; x++)

{

ListItem li = chklstStatuses.Items[x];

li.Attributes.Add("onClick","javascript:setFilter( this);");

}

doesn't work and I also tried
IEnumerator chklstEnumerator;

ListItem li;

chklstEnumerator = chklstStatuses.Items.GetEnumerator();

while(chklstEnumerator.MoveNext())

{

li = (ListItem)chklstEnumerator.Current;

li.Attributes.Add("onClick","javascript:setFilter( this);");

}

Neither one of these methods renders the attribute. I a compile fine and i
get no runtime or javascript errors in either case. I view the page source
and the attribute just doesn't seem to render.
Can anyone help?

Thanks,
~CK