function Inint_AJAX() {
   try { return new ActiveXObject("Msxml2.XMLHTTP");  } catch(e) {} //IE
   try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch(e) {} //IE
   try { return new XMLHttpRequest();          } catch(e) {} //Native Javascript
   alert("XMLHttpRequest not supported");
   return null;
};

function dochange(src, val, val1) {
     var req = Inint_AJAX();
     req.onreadystatechange = function () { 
          if (req.readyState==4) {
               if (req.status==200) {
                    document.getElementById(src).innerHTML=req.responseText; //retuen value
               } 
          }
     };
     req.open("GET", "state.php?data="+src+"&val="+val+"&val1="+val1); //make connection
     req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=iso-8859-1"); // set Header
     req.send(null); //send value
}

function pagechange(citival, countryval) {
    document.location = "?view=main&cityid="+citival+"&countryid="+countryval;
}

function getQueryVariable(variable) {
var query = window.location.search.substring(1);
var vars = query.split("&");
for (var i=0;i<vars.length;i++) {
  var pair = vars[i].split("=");
  if (pair[0] == variable) {
     return pair[1];
   }
}

} 
if (getQueryVariable('countryid') == undefined) {
  window.onLoad=dochange('states', -1);
  window.onLoad=dochange('cities', -1);
} else {
  window.onLoad=dochange('states', getQueryVariable('countryid'));
  window.onLoad=dochange('cities', getQueryVariable('countryid'), getQueryVariable('cityid'));
}