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Master/slave-boxes

Hi!

I am using the group extension of combo boxes, but have two issues.

In one case I am using two combo boxes for browsing, where I have attached an onChange event to the slave boxes that will load the right page as described below (it is done using AJAX, so the comboboxes will remain in the browser and not be reloaded). The problem is that the event seems to be fired not only when the slave-combo ('objectcombo') is changed, but also when the master-combo ('classcombo') is changed. Is there any way to avoid it?

Code:

var classcombo=new dhtmlXCombo("search_classcombobox","alfa2",160);
classcombo.enableFilteringMode(true);
classcombo.loadXML('ajax/allclasses.php');
var objectcombo = classcombo.setAutoSubCombo('ajax/objectsinclass.php','alpha2');
objectcombo.attachEvent('onChange',onChangeObjectFunc);


My second question regards another case of master/slave boxes, in this case for editing. In this case I have loaded values both to the master and to the slave from a database and want to be able to show both from the start (i.e. without the user having to do anything). Is it possible?

Best regards,
Gunnar