Jquery Ajax Dropdown Repeatedly Reset

From this question : JQuery Populate Dropdown by Attribute of tr tag Is there another way to accomplish this? I can't find the algorithm behind this JQuery Code VehicleCategory():

Solution 1:

You are calling the VehicleCategory() multiple times.. If you need to do this, then empty the prior contents..

change..

$("#brand"  + counterVehicle).append("<option value=''>-Select Brand-</option>");

to:

$("#brand"  + counterVehicle).html("<option value=''>-Select Brand-</option>");