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(br)
{
  var ver = getInternetExplorerVersion();
	with (document) {
  	if (br == "msie") {
      if ( ver > -1 ) {
        if ( ver >= 7.0 ) {
	  		  getElementById('schermo').style.display = "block";
	  		  mostra('fade');
        } else
          getElementById('schermo_ie6').style.display = "block";
  		}
    } else {
      getElementById('schermo').style.display = "block";
      mostra('fade');
    }
	}
}