if ( document.images )
{
	cover1_on = new Image();
	cover1_off = new Image();
	cover1_on.src = "<?=$imagevr?>/t1/images/dvd_cover1_on.gif";
	cover1_off.src = "<?=$imagevr?>/t1/images/dvd_cover1.gif";
	cover2_on = new Image();
	cover2_off = new Image();
	cover2_on.src = "<?=$imagevr?>/t1/images/dvd_cover2_on.gif";
	cover2_off.src = "<?=$imagevr?>/t1/images/dvd_cover2.gif";
	cover3_on = new Image();
	cover3_off = new Image();
	cover3_on.src = "<?=$imagevr?>/t1/images/dvd_cover3_on.gif";
	cover3_off.src = "<?=$imagevr?>/t1/images/dvd_cover3.gif";
	cover4_on = new Image();
	cover4_off = new Image();
	cover4_on.src = "<?=$imagevr?>/t1/images/dvd_cover4_on.gif";
	cover4_off.src = "<?=$imagevr?>/t1/images/dvd_cover4.gif";
	cover5_on = new Image();
	cover5_off = new Image();
	cover5_on.src = "<?=$imagevr?>/t1/images/dvd_cover5_on.gif";
	cover5_off.src = "<?=$imagevr?>/t1/images/dvd_cover5.gif";
	cover6_on = new Image();
	cover6_off = new Image();
	cover6_on.src = "<?=$imagevr?>/t1/images/dvd_cover6_on.gif";
	cover6_off.src = "<?=$imagevr?>/t1/images/dvd_cover6.gif";
	cover7_on = new Image();
	cover7_off = new Image();
	cover7_on.src = "<?=$imagevr?>/t1/images/dvd_cover7_on.gif";
	cover7_off.src = "<?=$imagevr?>/t1/images/dvd_cover7.gif";
	cover8_on = new Image();
	cover8_off = new Image();
	cover8_on.src = "<?=$imagevr?>/t1/images/dvd_cover8_on.gif";
	cover8_off.src = "<?=$imagevr?>/t1/images/dvd_cover8.gif";
	cover9_on = new Image();
	cover9_off = new Image();
	cover9_on.src = "<?=$imagevr?>/t1/images/dvd_cover9_on.gif";
	cover9_off.src = "<?=$imagevr?>/t1/images/dvd_cover9.gif";
	cover10_on = new Image();
	cover10_off = new Image();
	cover10_on.src = "<?=$imagevr?>/t1/images/dvd_cover10_on.gif";
	cover10_off.src = "<?=$imagevr?>/t1/images/dvd_cover10.gif";
}

function button_on( imgName )
{
	if ( document.images )
	{
		butOn = eval (imgName + "_on.src");
		document[imgName].src = butOn;
	}
}

function button_off( imgName )
{
	if ( document.images )
	{
		butOff = eval (imgName + "_off.src");
		document[imgName].src = butOff;
	}
}