Help with Javascript How to add multiple label/Search filter widget?


I was trying to make a search/ filter widget using blogger labels in dropdown menus. multiple labels selected will show posts that contain all of the selected labels. One example I have done. b HOw can I make them work at least combination of 4 labels like if I select a university from 1st dropdown menu, then the next dropdown menu should list engineering courses and if i select electronics engineering from that then next dropdown should list electronics papers list. of I had selected mechanical then it should list mechanical drop down list.


This is what i’m looking for last couple of months. Could you help me to setup similar kind of multiple dropdown search filter please…please…