javascript - Radio button value not inserting into database -


i have problem radio button value doesn't inserted database. i'm using ajax in php file request values , 1 of them radio button selected.

in external javascript file, variable "gender" assigned correctly according selected radio button. however, query executed in php file not insert radio button's value database @ all. rest of values inserted except radio button appears blank once table displayed.

note: i'm not using form.

these codes php file:

                               .                                .                             other codes                                .                                .  function insertrow($name, $address, $phone, $gender, $nation){     $table_info = "info";     $query_string = "insert $table_info(name, address, phone, gender, nation) values('$name', '$address', '$phone', '$gender', '$nation');";     $result = @mysql_query($query_string) or die (mysql_error());   } ?>  <?php  if(isset($_request['id'])){    $id  = rtrim($_request['id']);  }  if(isset($_request['name'])){ $name = $_request['name'];  }  if(isset($_request['address'])){   $address = $_request['address'];  }  if(isset($_request['phone'])){   $phone = $_request['phone'];  }  if(isset($_request['gender'])){   $gender = $_request['gender'];  }  if(isset($_request['nation'])){   $nation = $_request['nation'];  } $action = rtrim($_request['action']);  if($action=="delete"){  echo deleterow($id);  echo update_database(); } elseif($action=="insert"){  echo insertrow($name, $address, $phone, $gender, $nation);  echo update_database();  }    else{     echo update_database();   } ?>

these codes javascript file:

                           .                            .                        other functions                            .                            .   function insertthis(){   var name = document.getelementbyid("name").value;   var address = document.getelementbyid("address").value;   var phone = document.getelementbyid("phone").value;   var gender;   var radiobuttons = document.getelementsbyname("gender");   var nation = document.getelementbyid("nation").value;    var page = "database.php";    for(var i=0, length=radiobuttons.length; i<length; i++){   if(radiobuttons[i].checked){     gender = radiobuttons[i].value;    break;   }  }    var parameters = "name="+name+"&address="+address+"&phone="+phone+"&gender="+gender+"&nation="+nation+"&action=insert";    var xmlhttp = new xmlhttprequest();    if(xmlhttp==null){    alert("your browser not support ajax!");    return false;   }     xmlhttp.onreadystatechange=function(){     document.getelementbyid("divtable").innerhtml=xmlhttp.responsetext;  };   xmlhttp.open("get", page+"?"+parameters, true);   xmlhttp.send(null); }

and lastly, radio buttons in html file:

  <td>gender:</td>     <td><input checked type="radio"  name="gender" id="male"  value="male">male    <input type="radio" name="gender" id="female"  value="female">female</td>

you can change code this.

replace:

for(var i=0; length=radiobuttons.length; i<length; i++)

with:

for(var i=0; i< radiobuttons.length; i++)

rewrite:

for(var i=0; i< radiobuttons.length; i++){   if(radiobuttons[i].checked){     gender = radiobuttons[i].value;    break;   }  }

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