<!-- Begin
function Availability() {  
  var xmlHttp;
  var url = "http://www.power-on.com/ajax/availability.php";
  try { // Firefox, Opera 8.0+, Safari    
    xmlHttp=new XMLHttpRequest();    
  }
  catch (e) {    // Internet Explorer       
    try {      
      xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");      
    }
    catch (e) {      
      try {        
        xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");        
      }
      catch (e) {              
        return false;        
      }      
    }    
  }
  xmlHttp.onreadystatechange=function() {
    if (xmlHttp.readyState==4) {
      var xmlDoc=xmlHttp.responseXML.documentElement;
      var refresh=xmlDoc.getElementsByTagName("refresh")[0].childNodes[0].nodeValue;           
      var msg=xmlDoc.getElementsByTagName("msg")[0].childNodes[0].nodeValue;    
      var av="Availability: ";
      if (refresh==0) {
        av+=msg;
      }
      else {
        av+=msg;
        av+=" <a href='javascript:void(0)' onclick='Availability();'>(update)</a>"      
      }
      document.getElementById("availability").innerHTML=av;   
    }
  }
  xmlHttp.open("GET",url,true);
  xmlHttp.send(null);  
} 
//  End -->