php - Validate a form before sending it to paypal using jquery -

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i looking advise in how complete task. trying implement (see example) in website. basically, form buy button paypal , before submitted, has validated.

i not see problem. guidance appreciated.

this have far!

<form id="unlockform" action=""https://www.paypal.com/cgi-bin/webscr"" method="post">  <!-- identify business can collect payments. --> <input type="hidden" name="business" value="example@example.com">  <!-- specify buy button. --> <input type="hidden" name="cmd" value="_xclick">  <!-- specify details item buyers purchase. --> <input type="hidden" name="item_name" value="factory unlock iphone"> <input type="hidden" name="currency_code" value="usd"> <input type="hidden" name="bn" value="rcunlocks_buynow_unlock_us">  <!-- provide dropdown menu option field. -->     <div id="error_messages"></div> <label for="model">iphone model</label> <input type="hidden" name="on0" value="model"> <br /> <select id="model" name="os0"> <option value="select model">-- select model --</option> <option value="iphone 2g">iphone 2g</option> <option value="iphone 3g">iphone 3g</option> <option value="iphone 3gs">iphone 3gs</option> <option value="iphone 4">iphone 4</option> <option value="iphone 4s">iphone 4s</option> <option value="iphone 5">iphone 5</option> </select> <br />  <!-- provide dropdown menu option field prices. --> <label for="services">unlock service</label> <input type="hidden" name="on1" value="service"> <br /> <select id="service" name="os1" class="required"> <option value="sevice">-- select service --</option> <option value="instant-90min">at&amp;t instant-90min max -  $6.25</option> <option value="1-6hrs">at&amp;t 1-6 hours - $5.00</option> <option value="1-24hrs">at&amp;t 1-24 hours - $3.50</option> </select> <br />  <!-- specify price paypal uses each option. --> <input type="hidden" name="option_index" value="1"> <input type="hidden" name="option_select0" value="instant-90min"> <input type="hidden" name="option_amount0" value="6.25"> <input type="hidden" name="option_select1" value="1-6hrs"> <input type="hidden" name="option_amount1" value="5.00"> <input type="hidden" name="option_select2" value="1-24hrs"> <input type="hidden" name="option_amount2" value="3.50">      <label>imei #</label>     <input type="hidden" name="on2" value="imei#">     <input type="text" name="os2" id="imeino" maxlength="15"    required="required" > <br>         <!-- display payment button. --> <input type="image" name="submit" border="0" id="submit" src="paypal.gif"alt="paypal -     safer, easier way pay online" > <img alt="" border="0" width="1" height="1" src="https://www.paypalobjects.com/en_us/i/scr/pixel.gif"  >  </form>

here script!

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script> <script src="/js/jquery.validate.min.js"></script> <script> $(document).ready(function (){           jquery.validator.setdefaults({             errorplacement: function(error, element){                 error.appendto(element.parent().find('div.error_messages'));             }         });            $('#unlockform').validate({             rules:{                 model:{                     required:true                 },                 services:{                     required: true                 },                 imeino:{                     required: true,                     number: true                 };               },              messages:{                 model:{                     required: "please select 1 option.<br>"                 },                  services:{                     required: "please select 1 option.<br>"                 },                 imeino:{                     required: "you must enter phone's imei#.",                     number:"imei # must numbers only!!!"                 }               },              errorcontainer: "#error_messages",             errorlabelcontainer: "#error_messages"         });           submithandler:function(){             alert('form validation success!')         }       }); </script>

thank much!

here fiddle...form

my problem form not validated...!!


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