javascript - Get dialog box value to determine submit the form or not -

i have form this:

<form action="confirm-and-send.php" method="post" onsubmit="return(confirmation());">     <input lot of input fields here>     <button type="submit" name="confirm_and_send" id="submit-button"  class="sent-to-client-bttn" style="margin-left:630px;margin-top: -125px;"></button> </form>  

then have jquery ui function

function confirmation(){    $("#some-div").dialog({         bgiframe: true,         autoopen: false,         minheight: 200,         width: 350,         modal: true,         closeonescape: false,         draggable: false,         resizable: false,         buttons: {                 'yes': function(){                     $(this).dialog('close');                     callback(true);                 },                 'no': function(){                     $(this).dialog('close');                     callback(false);                 }             }     }); } function callback(value){      //do } 

i following here , here, didn't work me. if put event.preventdefault() yes button not submit for; if don't put submits form before choose of 2 options. can give me proper example?

take button outside of form.

<form action="" method="post" id="my_form" onsubmit="">         <input type="text" name="x"/>      </form>      <button name="confirm_and_send" id="submit-button" value="submit" class="sent-to-client-bttn" onclick="confirmation();">submit</button>     <div id="some-div" style="display:none">hi</div>   function confirmation(){      $("#some-div").dialog({         bgiframe: true,         minheight: 200,         width: 350,         modal: true,         closeonescape: false,         draggable: false,         resizable: false,         buttons: {                 'yes': function(){                     $(this).dialog('close');                     callback(true);                 },                 'no': function(){                     $(this).dialog('close');                     callback(false);                 }             }     });   } function callback(value){      alert(value); }