function addLoadEvent(func) {
    var oldonload = window.onload;
    if (typeof window.onload != 'function') {
	window.onload = func;
    } else {
	window.onload = function() {
	    oldonload();
	    func();
	}
    }
}

function PopupCentrer(page,largeur,hauteur,options) {
    var top=(screen.height-hauteur)/2;
    var left=(screen.width-largeur)/2;
    window.open(page,"","top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options);
}