function printPage() {
 if (window.print)
   window.print();
 else
   alert("To print:\n\nOn PCs, use Control + P.\n\nOn Macs, use Command + P.\n");
}

function viewCard(page){
        var wint = (screen.height - 400) / 2;
       	winprop  = 'height=400,width=700,top='+wint+',left=140,toolbar=no,resizable,scrollbars=no';      
       	var win = window.open(page, 'course', winprop);
       	if (parseInt(navigator.appVersion) >= 4) 
       	 { 
                win.window.focus(); 
       	 }
}