Form 3: Set calendar option with php ?

i’ve got the following code which an dhtmlxForm loads from php ( myForm.loadStruct(“structure.php”); )

echo '<item type="calendar" dateFormat="%Y-%m-%d %H:%i" isMonthEditable="true" name="birthDate" label="birthDate" validate="NotEmpty" width="360" bind="birthDate" readonly="true" />';

But the problem is that I can’t set the options like they are possible in javascript. For instance the isMonthEditable, isYearEditable, enableTime options for the calendar… and so on

How do I succesfully load them from my php structure file ?