var ajaxpdf4;

function pdfSwitch4(uri)
{
ajaxpdf4=null;
if (window.XMLHttpRequest)
  {// code for Firefox, Opera, IE7, etc.
  ajaxpdf4=new XMLHttpRequest();
  }
else if (window.ActiveXObject)
  {// code for IE6, IE5
  ajaxpdf4=new ActiveXObject("Microsoft.XMLHTTP");
  }
if (ajaxpdf4!=null)
  {
  ajaxpdf4.onreadystatechange=state_Change_casestudies;
  ajaxpdf4.open("GET",uri,true);
  ajaxpdf4.send(null);
  }
else
  {
  alert("Your browser does not support XMLHTTP.");
  }
}

function state_Change_casestudies()
{
if (ajaxpdf4.readyState==4)
  {// 4 = "loaded"
  if (ajaxpdf4.status==200)
    {// 200 = "OK"
    document.getElementById('viewercontainer2').innerHTML=ajaxpdf4.responseText;
    }
  else
    {
    alert("Error: " + ajaxpdf4.statusText + "?");
    }
  }
}