function popup(strUrl,iWidth,iHeight,options){

	largeur=iWidth;hauteur=iHeight;wtop=(screen.height-hauteur)/2;
	wleft=(screen.width-largeur)/2;
	if(!options) 
		options="resizable=no,location=no,menubar=no,status=no,scrollbars=yes";
	options = "top="+wtop+",left="+wleft+",width="+largeur+",height="+hauteur+","+options;
	window.open(strUrl,'',options);
}