function createRequestObject() {  

       var req;  
     
       if(window.XMLHttpRequest){  
          // Firefox, Safari, Opera...  
          req = new XMLHttpRequest();  
       } else if(window.ActiveXObject) {  
          // Internet Explorer 5+  
          req = new ActiveXObject("Microsoft.XMLHTTP");  
       } else {  
          // There is an error creating the object,  
          // just as an old browser is being used.  
          alert('Problem creating the XMLHttpRequest object');  
       }  
     
       return req;  
     
    }  
     
    // Make the XMLHttpRequest object  
    var http = createRequestObject();  
     
    function sendRequest(users,zipcode,cityname,sexb,agef,aget) {  
     
       // Open PHP script for requests  
       http.open("get", "getperson.php?users="+users + "&zipcode=" + zipcode + "&cityname=" + cityname + "&sexb=" + sexb + "&agef=" + agef + "&aget=" + aget);  
       http.onreadystatechange = handleResponse;  
       http.send(null);  
     
    }  
     
    function handleResponse() {  
     
       if(http.readyState == 4 && http.status == 200){  
     
          // Text returned FROM the PHP script  
          var response = http.responseText;  
     
          if(response) {  
             // UPDATE ajaxTest content  
             document.getElementById("results").innerHTML = response;  
          }  
     
       }  
     
    }