function popup(adresse,target,width,height,scrollbars) {
	var left,top,popupLeft,popupTop = null;
	
	left=document.body.clientWidth - width;
	popupLeft = left/2;
	
	top=document.body.clientHeight - height;
	popupTop = top/2;
	
	popupwindow = window.open(adresse, target, "toolbar=no,location=no,status=no,menubar=no,scrollbars="+scrollbars+",resizable=no,width="+width+",height="+height+",left="+popupLeft+",top="+popupTop+"");
	popupwindow.focus();
}