function CenterWindow()
{
    /*
    if( 'Microsoft Internet Explorer' == navigator.appName )
        window.moveTo( (window.screen.width/2) - (window.width/2) , (window.screen.height/2) - (window.height/2) ) ;
    else
        window.moveTo( (window.screen.width/2) - (window.outerWidth/2) , (window.screen.height/2) - (window.outerHeight/2) ) ;
    */


    if (document.body)
    {
    // pour IE
    var largFenetre = (document.body.clientWidth);
    var hautFenetre = (document.body.clientHeight);
    } 
    else
    {
    // pour les autres ...
    var largFenetre = (window.innerWidth);
    var hautFenetre = (window.innerHeight);
    }
    var largeur=screen.availWidth; 
    var hauteur=screen.availHeight; 
    var posX=((largeur-largFenetre)/2); 
    var posY=((hauteur-hautFenetre)/2); 
    window.moveTo(posX,posY); 
};