Attach a combobox - checkbox to a form?

Hi,

I have currently a form populated with some data, the problem is that i need to change the current combo attached to the form to a combo which enables multiple select using checkboxes.

The combo initialization on the form looks like this:

{ type: "combo", width: 183, name: "requiredAttCombo", comboType: "checkbox", readonly: true, label: "Attendees" }

However this does not render the checkboxes that i am so desperate to have.

Help on this one whould be greatly appriciated guys.

Please replace your dhtmlxform_item_combo.js file with file from attachment
dhtmlxform_item_combo.zip (1.35 KB)