Php e在jquery$（'.assettitle'）.on（'change'，function（）{$（this.data）（'cq1'，$（this.find（'option'）.length）；}）中发布；函数checkAssets（）{$（'.asset

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e在jquery$（'.assettitle'）.on（'change'，function（）{$（this.data）（'cq1'，$（this.find（'option'）.length）；}）中发布；函数checkAssets（）{$（'.assettitle'）.each（函数（）{if（typeof$（this.data（'cq1'）==未定义的| |$（this.data（'cq1'）<1）{return false；}否则{return true；}）；}什么问题？告诉我错误或更具体一点，please@AkashSethi请注意，您将cq1作为数据名输入，这不是很直观，另一方面，这是一个选项，您选择了所有选项，但您需要选定的选项，因此$（this）。find（'option:selected'）。length，检查控制台上的数据值是否正常工作，并在此处输入一些错误以允许我进行调试。

$('.assets-selected').on('change', function(){
   $(this).data( "selecteds", $(this).find('option').length);
});

function checkAssets(){
   $('.assets-selected').each(function(){
       if (typeof $(this).data('selecteds') == undefined ||  $(this).data('selecteds') < 1) {
            return false;
       } else {
            return true;
       }
   });
}

if(checkAssets()) {
            //submit the form to server
            $.ajax({
                url : '../pages/php_action/addnewlead/creatlead.php',
                type : 'POST',
                data : form.serialize(),
                dataType : 'json',
                success:function(response) {


                    // remove the error 
                    $(".form-group").removeClass('has-error').removeClass('has-success');

                    if(response.success == true) {
                        $(".messages").html('<div class="alert alert-success alert-dismissible" role="alert">'+
                          '<button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>'+
                          '<strong> <span class="glyphicon glyphicon-ok-sign"></span> </strong>'+response.messages+
                        '</div>');

                        // reset the form
                        $("#newleadform")[0].reset();
                        // reload page after 7 sec.
                        setInterval(function () {
                        location.reload(null, false);
                        }, 7000);

                    } else {
                        $(".messages").html('<div class="alert alert-warning alert-dismissible" role="alert">'+
                          '<button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>'+
                          '<strong> <span class="glyphicon glyphicon-exclamation-sign"></span> </strong>'+response.messages+
                        '</div>');
                    }  // /else
                } // success  
            }); // ajax subit               
        } /// if

<?php  
 //load_data.php  
 $connect = mysqli_connect("localhost", "root", "", "test");  
 $output = '';
 if(isset($_POST["assetid"]))  
 {  

  if($_POST["assetid"] != '')
  {  
       $sql = "SELECT * FROM customquestions WHERE assetid = '".$_POST["assetid"]."'";

  }  
  else
  {  
       $sql = "SELECT * FROM customquestions WHERE assetid = 'akash'";

  }
  $result = mysqli_query($connect, $sql);
  $quesno = 1;

  while($row = mysqli_fetch_array($result))  
  {  
      //poor and ugly way to do something to filter, the best solution is the questions have a table 1 to N, where the 1 table is cover, main information and the N the questions, so each index from your array will be filled only with the questions that db has stored else will bring nothing and you can validate better the frontend, besides provides more scalability.
        if ($row['colqa1'] == '' && $row['colqa2'] == '' && $row['colqa3'] == '' && $row['colqa4'] == '' && $row['colqa5'] == '' && $row['colqa5'] == '' && $row['colqa6'] == '' && $row['colqa7'] == '' && $row['colqa8'] == '' && $row['colqa9'] == '' && $row['colqa10'] == ''){
             continue;
            //don't show dropdown if you don't have questions!  
       }
       $output .= '<div class="col-sm-6">';
       $output .= '<div class="form-group">';
       $output .= '<label for="campaignname">'.$row["cqname"].'</label>';
       $output .= '<select name="cq'.$quesno.'" size="5" class="form-control assets-selected" required>';
       // $output .= '<div style="border:1px solid #ccc; padding:20px; margin-bottom:20px;">'.$row["product_name"].'</div>';
       // $output .= '<tr><td>'.$row["cqname"].'<br></td>';
       $output .= '<option value="" required>Select Custom Question Answer</option>
                   <option value="'.$row["cqa1"].'">'.$row["cqa1"].'</option>
                   <option value="'.$row["cqa2"].'">'.$row["cqa2"].'</option>
                    <option value="'.$row["cqa3"].'">'.$row["cqa3"].'</option>
                    <option value="'.$row["cqa4"].'">'.$row["cqa4"].'</option>
                    <option value="'.$row["cqa5"].'">'.$row["cqa5"].'</option>
                    <option value="'.$row["cqa6"].'">'.$row["cqa6"].'</option>
                    <option value="'.$row["cqa7"].'">'.$row["cqa7"].'</option>
                    <option value="'.$row["cqa8"].'">'.$row["cqa8"].'</option>
                    <option value="'.$row["cqa9"].'">'.$row["cqa9"].'</option>
                    <option value="'.$row["cqa10"].'">'.$row["cqa10"].'</option>
                   </select>';
       // $output .= '<tr><td colspan="10"><hr></td></tr>';
       $output .= '</div></div></div>';
       $quesno++;
  }  
  echo $output;
 }  
 ?>