function getInternetExplorerVersion()
// Returns the version of Internet Explorer or a -1
// (indicating the use of another browser).
{
  var rv = -1; // Return value assumes failure.
  if (navigator.appName == 'Microsoft Internet Explorer')
  {
    var ua = navigator.userAgent;
    var re  = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
    if (re.exec(ua) != null)
      rv = parseFloat( RegExp.$1 );
  }
  return rv;
}
function checkVersion()
{
  var msg = "You're not using Internet Explorer.";
  var ver = getInternetExplorerVersion();

  if ( ver > -1 )
  {
    if ( ver < 7.0 ) {
   	   msg = "Sorry, this website does not support your version of Internet Explorer. Please update to the latest version of Internet Explorer by clicking <a href='http://www.microsoft.com/windows/internet-explorer/default.aspx' style='color:#fff;'>here</a>.";
      
	     document.write("<style>#ie_wrapper {display:none;}</style>");
		  document.write("<div style='margin:20px auto; display:inherit; width:500px; padding:10px; border:1px solid red; color:white; font-weight:bold; background:red; text-align:center;'>");
		  document.write(msg);
		  document.write("</div>");
		  return false;
	  }
  }
  
}

checkVersion();