javascript - Submit Form When User Clicks OK on Confirm Box -

i have javascript in html form runs when user clicks submit button. displays total price users order , has buttons "ok" , "cancel". want form submitted when user clicks "ok", not submitted if user clicks "cancel". submits form when either button pressed. how keep submitting form if "cancel" clicked?

this short script:

<script type="text/javascript">             function calculate()             {                 var gprice                 var aprice                 var sprice                 var total                  gprice = document.getelementbyid("grapeorderquantity").value * 4.0;                 aprice = document.getelementbyid("appleorderquantity").value * 3.0;                 sprice = document.getelementbyid("strbryorderquantity").value * 3.5;                  total = (gprice + aprice + sprice) * 1.08;                  confirm("this total: " + total);             }         </script> 

this html submit button:

<input type="submit" value="submit" onclick="return calculate()" /> 

put function:

if(confirm("this total: " + total)) { // confirm returns true = ok clicked     return true; } else { // confirm returns false = cancel clicked     return false; }