javascript - Two forms on one page with same input fields -


so have 2 identical forms on page cannot give different names, because tied back-end.

i have few input fiends same id's on diferent forms, checked if empty document.getelementbyid('id').value;

strange thing is, half of input fields checked on 1 of forms , other half checked other form (this when user entering values in 1 of forms), despite them using 2 different javascript functions. 1 input field gets closest id automatically, others goes way other form.

my question how can value of elements checked closest submit button (or other element near 1 of forms)?

i tried jquest closest() method, can't seem work of document.getelementbyid.

element ids should unique. should never have 2 or more elements same id. document.getelementbyid('someid') expecting return 1 element, not array of elements - there other functions available if want multiple elements dont require duplicate ids.

from w3schools:

an id should unique within page. however, if more 1 element specified id exists, getelementbyid() method returns first element in source code.

more html dom getelementbyid() method


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