function MyAjaxRequest(target_div,file,check_div){
 var MyHttpRequest = false;
 var MyHttpLoading = '<p>Loading...</p>';
 var ErrorMSG = 'Sorry - No XMLHTTP support in your browser, buy a newspaper instead';
 if(check_div) var check_value = document.getElementById(check_div).value;
 else var check_value = '';
 if(window.XMLHttpRequest){
  try{
   MyHttpRequest = new XMLHttpRequest();
  }catch(e){
   MyHttpRequest = false;
  }
 }else if(window.ActiveXObject){
  try{
   MyHttpRequest = new ActiveXObject("Msxml2.XMLHTTP");
  }catch(e){
   try{
    MyHttpRequest = new ActiveXObject("Microsoft.XMLHTTP");
   }catch(e){
    MyHttpRequest = false;
   }
  }
 }else MyHttpRequest = false;
 if(MyHttpRequest){
  var random = Math.random() * Date.parse(new Date());
  var file_array = file.split('.');
  if(file_array[1] == 'php') var query_string = '?rand=' + random;
  else if(file_array[1] == 'htm' || file_array[1] == 'html') var query_string = '';
  else var query_string = check_value + '&rand=' + random;
  MyHttpRequest.open("get", url_encode(file + query_string), true);
  MyHttpRequest.onreadystatechange = function (){
   if(MyHttpRequest.readyState == 4) document.getElementById(target_div).innerHTML = MyHttpRequest.responseText;
  }
  MyHttpRequest.send(null);
 }else document.getElementById(target_div).innerHTML = ErrorMSG;
}

function url_encode(string){
 var string;
 var safechars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz/-_.&?=";
 var hex = "0123456789ABCDEF";
 var encoded_string = "";
 for(var i = 0; i < string.length; i++){
  var character = string.charAt(i);
  if(character == " ") encoded_string += "+";
  else if(safechars.indexOf(character) != -1) encoded_string += character;
  else{
   var hexchar = character.charCodeAt(0);
   if(hexchar > 255) encoded_string += "+";
   else{
    encoded_string += "%";
    encoded_string += hex.charAt((hexchar >> 4) & 0xF);
    encoded_string += hex.charAt(hexchar & 0xF);
   }
  }
 }
 return encoded_string;
}