function arrows()
{
    
    if (day > 1)
    {
    	document.write ('<a href="day')
    	document.write (day - 1);
    	document.write ('.html"><img src="icons/4ARROW3.GIF" alt="Previous day" align="center" border=0></a>');
    }
    if (day < 17)
    {
    	document.write ('&nbsp;<a href="day')
    	document.write (day + 1);
    	document.write ('.html"><img src="icons/4ARROW4.GIF" alt="Next day" align="center" border=0></a>');
    }
}