function addToFavorites() {
	if (window.sidebar) {
   		window.sidebar.addPanel(document.title,window.location.href,"");
    } else if( window.external ) {
   		window.external.AddFavorite(window.location.href, document.title);
    }
}

function w_open(url) {
	var w = screen.availWidth; 
	var h = screen.availHeight; 
	var popW = 450, popH = 220; 
	var leftPos = (w-popW)/2, topPos = (h-popH)/2; 
	var options = "top="+topPos+",left="+leftPos+",width=450,height=220,titlebar=no,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=no";
	new_wi = window.open(url,'envoyer_a_un_ami', options); 
	new_wi.focus();
}