function alertSize() {
  var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
  window.alert( 'Width = ' + myWidth );
  window.alert( 'Height = ' + myHeight );
}

/****************************
function openViewer(url)
{
	var left =0;
	var top = 0; 	
	var width = screen.width;
	var height = screen.height;	
	var winName = 'book'+Math.round(10000*Math.random());
	window.open(url, winName, 'top='+top+',left='+left+',width='+width+',height='+height+',resizable=yes,location=no,menubar=no,status=no,scrollbars=no,menubar=no');
	
	return false;
}

/********************************************************/

function getBrowserName()

{
        
if (navigator.userAgent.indexOf("Firefox")!=-1)
{
return "firefox";
}
  
if (navigator.userAgent.indexOf("MSIE")!=-1)
{
return "msie";
}
    
}



function getUserLang()

{
    //renvoie la langue definie dans les paramètres régionaux
    
    if (navigator.userAgent.indexOf("Firefox")!=-1)
    {
      return (navigator.language).substr(0,2);
    }
    else
   {
            if (navigator.userAgent.indexOf("MSIE")!=-1)
            {
               return ((navigator.userLanguage).substr(0,2));
            }
            
            else
            
            {
             return "en";
            }
  }
}

//****************************


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 = "";
  var ver = getInternetExplorerVersion();

  if ( ver > -1 )
  {
    if ( ver >= 7.0 ) 
    {
     msg=ver ;//msg = "You're using a recent copy of Internet Explorer."
     }
    else
    {
      msg = "Vous utilisez une vielle version d'Internet Explorer. Pour exploiter pleinement les fonctionnalités de ce site, veuillez installer la version 7.0 ou ultérieure d'Internet Explorer.";
      alert( msg );
     }
 
  }
  
}

//************************************

function openwindow(url) 
{
var brows=getBrowserName();
var lang=getUserLang();
var fullUrl=url+"&screenH="+screen.availHeight+"&screenW="+screen.availWidth+"&browserName="+brows+"&userLang="+lang;
var options = 'scrollbars=yes,resizable=yes,status=no,toolbar=no,menubar=no,location=no';
options += ',width=' + screen.availWidth + ',height=' + screen.availHeight;
options += ',screenX=0,screenY=0,top=0,left=0';
var win = window.open(fullUrl, '', options);
//win.focus();
//win.moveTo(0, 0); 
return false;
}