var win = null;

function popup(url, nom, w, h, wscroll, resizable){
	pleft=(screen.width) ? (screen.width-w)/2 : 0;
	ptop=(screen.height) ? (screen.height-h)/2 : 0;
	//left=100;
	//top=100;
	settings='height='+h+',width='+w+',top='+ptop+',left='+pleft+',scrollbars='+wscroll+',resizable='+resizable+'';
	win=window.open(url, nom, settings);
}