function changeMessage(lang)
{
	var msg;
	
	if(lang=='en') msg='Select your language';
	if(lang=='de') msg='Wählen Sie Ihren language aus';
	if(lang=='it') msg='Selezionate il vostro language';
	if(lang=='es') msg='Seleccione su language';
	if(lang=='fr') msg='Sélectionnez votre language';
    document.getElementById("bloc").innerHTML = msg;
}
function alertSize(taille) {
  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;
  }
  if(taille=='width') { return myWidth;}
  if(taille=='height') {return myHeight;}
}