jquery - Javascript Confirm on Form Submit Not Canceling -

i have pretty simple javascript function want include in form (submit or cancel). problem it's supposed cancel form submit if push cancel. right gives me appropriate warning, continues submitting form whether push "ok" or "cancel".

i'm new js sorry if i'm missing basic, can't seem find solid answer seemingly simple problem.

javascript

function confirmdelete() { confirm("deleting answer may cause dataloss, sure want continue?") } 

php / html

echo '     <form onsubmit="confirmdelete()" class="answerform" id="deletelink" action="/admin/questions" method="post"     onsubmit="return confirm("do want delete answer?");>         <input type="hidden" name="ansdel" value="' . $row['id'] . '">         <input type="hidden" name="notice" value="you have deleted: ' . $row['answer'] . '">         <input class="answerbutton" id="deletebutton" type="submit" value="delete">     </form> '; 

change to

function confirmdelete() {     return confirm("deleting answer may cause dataloss, sure want continue?") }