onBeforeActive

This event calls user-defined handlers (if there are any) and passes the following parameter:

• itemId - the id of an item.

dhxAccord.attachEvent("onBeforeActive", function(itemId){
   // code here
   return true; // item will be opened
   return false; // item will not be opened
});    
   // or
function doOnBeforeActive(itemId){
   // code here
   return true; // item will be opened
   return false; // item will not be opened
});    
dhxAccord.attachEvent("onBeforeActive", doOnBeforeActive);