"Select" attribute in using form leaves

I connect dhtmlxform’s combo option with sql database using php.I use “onchange” command to get value of another inputs(textboxes) from database.when Onchange event occur then combo lost its value.Is any solution for that? Thanks

Hello
Plase, create and attach completed demo to reproduce the issue and test it.
docs.dhtmlx.com/doku.php?id=othe … leted_demo