$(function(){
    var extraFieldsPlaced = 0;
    var extraFields = '<br /><label for="dd_account" style="float:left; width:100px">Rekening: </label><input id="dd_account_formId" type="text" name="dd_account" value="" size="30" maxlength="35" style="" /><br /><label for="dd_account" style="float:left; width:100px">Naam: </label><input id="dd_name_formId" type="text" name="dd_name" value="" size="30" maxlength="35"  /><br style="" /><br />';
    $("input[value=3gKuSz0vYHWq4adc02WL5Q]").click(function(){
        if (extraFieldsPlaced===0) {
            $("input[type=submit][value=Bestelling afronden]").before(extraFields);
        }
        extraFieldsPlaced=1;
    });
});