
I want to create a multilevel dropdown list in html like in above pic.
    <select id ="dropdown">
    <option value="consolidated" id="consolidated">All Schools & Companies</option>
    <option value="company">Companies</option>
    <option value="school" id ="school">Schools</option>
    </select> 
this is my base level 1 list. if I click on "Companies" then a new sub menu should open showing companyA companyB, If i click on "Schools" then i should get a another sub menu showing schoolA, schoolB.
 
     
    