function openWin(){
	newWin = window.open("howto_win.html","newwindow","width=620,height=470,resizable=yes,status=no,scrollbars=1");
}
function openMac(){
	newWin = window.open("howto_mac.html","newwindow","width=620,height=470,resizable=yes,status=no,scrollbars=1");
}