var xmlHttp

function showStaff(str)
{ 
  if (str.length > 0)
  { 
    var url="staff_" + str + ".htm"
    xmlHttp=GetXmlHttpObject(stateChanged)
    xmlHttp.open("GET", url , true)
    xmlHttp.send(null)
  } 
  else
  { 
    document.getElementById("Contents").innerHTML=""
  } 
} 
  
function stateChanged() 
{
  if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
  {
    document.getElementById("Content").innerHTML=xmlHttp.responseText 
  } 
} 
  
function GetXmlHttpObject(handler)
{ 
  var objXmlHttp=null
  
//  if (navigator.userAgent.indexOf("Opera")>=0)
//  {
    // This example doesn't work in Opera
//    return 
//  }
  
  if (navigator.userAgent.indexOf("MSIE")>=0)
  { 
    var strName="Msxml2.XMLHTTP"
    
    if (navigator.appVersion.indexOf("MSIE 5.5")>=0)
    {
      strName="Microsoft.XMLHTTP"
    }
     
    try
    { 
      objXmlHttp=new ActiveXObject(strName)
      objXmlHttp.onreadystatechange=handler 
      return objXmlHttp
    } 
    catch(e)
    { 
      alert("Error. Scripting for ActiveX might be disabled") 
      return 
    } 
  }
   
  if (navigator.userAgent.indexOf("Mozilla")>=0)
  {
    objXmlHttp=new XMLHttpRequest()
    objXmlHttp.onload=handler
    objXmlHttp.onerror=handler 
    return objXmlHttp
  }
}