提交时使用javascript ajax

Question

i am using a google map api to get location. i have used the below function onchange of address field. it is working properly onchange. i have used same function on submit in the same form to checking the function once again while submitting using a onsubmit attribute. but while submitting i cant able to get answer from this ajax because of the that return by using this return true the form submit with pout getting answer.

please any one find a solution for this

function validatePlaceForm(){

            var frm = document.frmOncampus;     

            var oncampusAddress = frm.oncampusAddress.value;

            var xmlhttp;
            if (window.XMLHttpRequest){// code for IE7+, Firefox, Chrome, Opera, Safari
              xmlhttp=new XMLHttpRequest();
            }else{// code for IE6, IE5
              xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
            }
            xmlhttp.onreadystatechange=function(){

            if (xmlhttp.readyState==4 && xmlhttp.status==200){
            //document.getElementById("my_div").innerHTML=''
            var result =xmlhttp.responseText;
                //alert(result);
                var both  =result.split("|");
                    frm.oncampusLatitude.value=both[0];
                    frm.oncampusLongtitude.value=both[1];
            }
          }
            var url='latlog.php?address='+oncampusAddress;

            xmlhttp.open("GET",url,true);
            xmlhttp.send();

            return true;

        }

Answer 1

Change the return value from true to false and call this function like this: onsubmit="return validatePlaceForm();"

This should do the trick.