jquery - creating combobox with parent and child items in codeigniter -


i have 3 parent items nr,wr,sr nr has n1,n2,n3 , wr has w1,w2,w3 , sr has s1,s2 child items respectively. @ initial when form loads should have 3options select.if select nr default nr child items n1,n2,n3 should checked.and if select nr , after wr left selected items n1,n2,n3,w1,w2,w3. want selected items value , send database fetch data. view when nr selected dropdown

 nr (checked)n1 (checked)n2 (checked)n3 wr er


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