if (document.images)
{
	img01on = new Image();
	img01on.src = "img/btn_01on.gif";
	img02on = new Image();
	img02on.src = "img/btn_02on.gif";
	img03on = new Image();
	img03on.src = "img/btn_03on.gif";
	img04on = new Image();
	img04on.src = "img/btn_04on.gif";
	img05on = new Image();
	img05on.src = "img/btn_05on.gif";
	img06on = new Image();
	img06on.src = "img/btn_06on.gif";
	img07on = new Image();
	img07on.src = "img/btn_07on.gif";
	

	img01off = new Image();
	img01off.src = "img/btn_01off.gif";
	img02off = new Image();
	img02off.src = "img/btn_02off.gif";
	img03off = new Image();
	img03off.src = "img/btn_03off.gif";
	img04off = new Image();
	img04off.src = "img/btn_04off.gif";
	img05off = new Image();
	img05off.src = "img/btn_05off.gif";
	img06off = new Image();
	img06off.src = "img/btn_06off.gif";
	img07off = new Image();
	img07off.src = "img/btn_07off.gif";

}


function imgOn(imgname)
 {
 	if (document.images)
 	 {
 	 	document[imgname].src = eval(imgname + "on.src");
 	 }
 	}

 function imgOff(imgname)
 {
 	if (document.images)
 		{
 			document[imgname].src = eval(imgname + "off.src");
 		}
 	}