javascript - Uncaught TypeError: Cannot read property 'next_page' of undefined -



javascript - Uncaught TypeError: Cannot read property 'next_page' of undefined -

i'm working on site client , bit of code has worked in past, no longer working. no 1 has touched core code , i'm not sure resolution.

we utilize docebo (an lms) , in test require pupil select reply before can click "next question". if haven't selected answer, button grayed out , unclickable. believe framework using yui library this.

i don't "uncaught typeerror: cannot read property 'next_page' of undefined " error until select answer. 1 time error happens, button doesn't become functional.

chrome's console points bit of code...

function controltotquestion() { var info = yahoo.util.dom.get('answer_info'); if(tot_question == 0) { settimeout(function() { if(yahoo.buttonobjects.next_page) yahoo.buttonobjects.next_page.set('disabled', false); if(yahoo.buttonobjects.show_result) yahoo.buttonobjects.show_result.set('disabled', false); if(info) info.style.display = 'none'; }, 0); } else { settimeout(function() { if(yahoo.buttonobjects.next_page) yahoo.buttonobjects.next_page.set('disabled', true); if(yahoo.buttonobjects.show_result) yahoo.buttonobjects.show_result.set('disabled', true); if(info) info.style.display = 'block'; }, 0); } }

any help much appreciated!

thanks!

it's trying read property next_page of yahoo.buttonobjects. hence yahoo.buttonobjects undefined. in other words, whatever yahoo is, no longer has element called buttonobjects. yahoo external library? if so, check whether they've removed buttonobjects functionality.

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