<script src="../js/jquery2.0.3.min.js"></script>
<script>
    var userid="" ;
    var username="";
    var usermobile="";
    var useremail="";
    var password="";
$(document).ready(function(){

        $.ajax({
                            type:'POST',
                            url:'insertuserdata.php',
                            data:{'userid':userid,'username':username,'usermobile':usermobile,'useremail':useremail,'password':password},
                            success: function(data){
                                alert(data);

                            }

            });

 });