[Zope] Text box with qualifier and Javascript

OK guys, Is it possible to specify an input box with a qualifier (:int) and then check it when the form is submitted using javascript? - the name of the box now includes the :int i.e. <input type="text" name="event:int" size="10" value="5"> ..... ..... <script Language="Javascript"> function checkform(myform) { if(myform.event:.value=="") {alert("The event cannot be blank!") myform.event.focus() return false} Help! Laurie