jquery - Alert if the checkbox is checked without a value and submitted -


i want when click on submit button, should alerts me if checkbox checked without value in text box. , after corrected, when click on submit, should values of text box checked.

<center>     proceed checking?     <input type="radio" id="radio1" name="radio" value='yes' />     <label for="radio1">yes</label>     <input type="radio" id="radio2" name="radio" value='no'/>     <label for="radio2">no</label>     <script src="https://code.jquery.com/jquery-1.10.2.js"></script>     <br><br>     <div class="result1"></div>     <div class="result2"></div>     <div class="result3"></div>     <div class="result4"></div>     <script>         $(function() {              $("input[name='radio']").on("change", function() {                 if ($("input[name='radio']:checked").val() == "yes") {                     document.queryselector('.result1').innerhtml = 'enter requirements:';                     $('.result1').html('enter requirements:').fadein('fast');                     document.queryselector('.result2').innerhtml = '<input type="checkbox" name="dn" >dn length:<input type="text" name="dnlength" />';                     $('.result2').html('<input type="checkbox" name="dn"> dn length: <input type="text" name="dnlength" />').fadein('fast');                     document.queryselector('.result3').innerhtml = '<input type="checkbox" name="dn"> valid digits:<input type="text" name="valid" />';                     $('.result3').html('<input type="checkbox" name="dn"> valid digits: <input type="text" name="valid" />').fadein('fast');                     document.queryselector('.result4').innerhtml = '<button type="submit" value="submit" onclick="checkboccheck()">submit</button>';                     $('.result4').html('<button type="submit" value="submit">submit</button>').fadein('fast');                 }                 if ($("input[name='radio']:checked").val() == "no") {                     $('.result1').fadeout('fast');                     $('.result2').fadeout('fast');                     $('.result3').fadeout('fast');                     $('.result4').fadeout('fast');                 }              });         });     </script> </center>

check fiddle, hope looking for,

<form id="myform"> <center>would proceed checking? <input type="radio" id="radio1" name="radio" value='yes' /><label for="radio1">yes</label> <input type="radio" id="radio2" name="radio" value='no'/><label for="radio2">no</label>     <br><br> <div class="result1"></div> <div class="result2"></div> <div class="result3"></div> <div class="result4"></div>      </center>     </form>      $.fn.serializeobject = function() {     var o = {};     var = this.serializearray();     $.each(a, function() {         if (o[this.name] !== undefined) {             if (!o[this.name].push) {                 o[this.name] = [o[this.name]];             }             o[this.name].push(this.value || '');         } else {             o[this.name] = this.value || '';         }     });     return o; };  $(function () {      $("input[name='radio']").on("change", function () {          if($("input[name='radio']:checked").val() == "yes"){                 document.queryselector('.result1').innerhtml = 'enter requirements:';                 $('.result1').html('enter requirements:').fadein('fast');                 document.queryselector('.result2').innerhtml =  '<input type="checkbox" name="dn" >dn length:<input type="text" name="dnlength" />';                 $('.result2').html('<input type="checkbox" name="dn"> dn length: <input type="text" name="dnlength" />').fadein('fast');                  document.queryselector('.result3').innerhtml =  '<input type="checkbox" name="dn"> valid digits:<input type="text" name="valid" />';                 $('.result3').html('<input type="checkbox" name="vd"> valid digits: <input type="text" name="valid" />').fadein('fast');                  document.queryselector('.result4').innerhtml =  '<button type="submit" value="submit" onclick="checkboccheck()">submit</button>';                 $('.result4').html('<button type="submit" value="submit">submit</button>').fadein('fast');              }           if($("input[name='radio']:checked").val() == "no"){             $('.result1').fadeout('fast').html('');             $('.result2').fadeout('fast').html('');             $('.result3').fadeout('fast').html('');             $('.result4').fadeout('fast').html('');             }        });      $('#myform').submit(function(){         var formdata = $(this).serializeobject();         console.log(formdata);         if(formdata.radio =='yes'){             if(formdata.dn == 'on'){                 if(!formdata.dnlength){                  alert('please enter dn length.');                  return false;                 }             }             if(formdata.vd == 'on'){                if(!formdata.valid){                  alert('please enter valid digints');                  return false;                 }             }             if(!formdata.dn && !formdata.vd){                 alert('please choose atleast 1 requirements!');                 return false;             }         }else{              alert('you cannot submit form!');              return false;         }      });  });

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