$(document).ready(function(){

productForm = $("body#www-osp-uk-com.product #product div.pdv-mini-enquiry-form form");
if (productForm.length){
      productForm.submit(function(){ 
          if ($.trim($("div.pdv-mini-enquiry-form input#mini-enquiry-first-name").val()) == '' ){
              alert('Please enter your First Name');
              return false;
         }
          if ($.trim($("div.pdv-mini-enquiry-form input#mini-enquiry-surname").val()) == '' ){
              alert('Please enter your Last Name');
              return false;
          }
          if ($.trim($("div.pdv-mini-enquiry-form input#mini-enquiry-company").val()) == '' ){
              alert('Please enter your Company Name');
              return false;
          }
          if ($.trim($("div.pdv-mini-enquiry-form input#mini-enquiry-email").val()) == '' ){
              alert('Please enter your Email Address');
              return false;
          }
          if ($.trim($("div.pdv-mini-enquiry-form input#mini-enquiry-phone").val()) == '' ){
              alert('Please enter your Phone Number');
              return false;
          }
      });
}

$("<em>*</em>").insertAfter("div.pdv-mini-enquiry-form label#mini-enquiry-first-name-label span.desc");
$("<em>*</em>").insertAfter("div.pdv-mini-enquiry-form label#mini-enquiry-surname-label span.desc");
$("<em>*</em>").insertAfter("div.pdv-mini-enquiry-form label#mini-enquiry-company-label span.desc");
$("<em>*</em>").insertAfter("div.pdv-mini-enquiry-form label#mini-enquiry-email-label span.desc");
$("<em>*</em>").insertAfter("div.pdv-mini-enquiry-form label#mini-enquiry-phone-label span.desc");

});