if (document.images)
{
	imgs01on = new Image();
	imgs01on.src = "img/btn_01on.gif";
	imgs02on = new Image();
	imgs02on.src = "img/btn_02on.gif";
	imgs03on = new Image();
	imgs03on.src = "img/btn_03on.gif";
	imgs04on = new Image();
	imgs04on.src = "img/btn_04on.gif";
	imgs05on = new Image();
	imgs05on.src = "img/btn_05on.gif";
	imgs06on = new Image();
	imgs06on.src = "img/btn_06on.gif";
	imgs07on = new Image();
	imgs07on.src = "img/btn_07on.gif";
	imgs08on = new Image();
	imgs08on.src = "img/btn_08on.gif";
	imgs09on = new Image();
	imgs09on.src = "img/btn_09on.gif";
	imgs10on = new Image();
	imgs10on.src = "img/btn_10on.gif";
	imgs11on = new Image();
	imgs11on.src = "img/btn_11on.gif";
	imgs12on = new Image();
	imgs12on.src = "img/btn_12on.gif";
	imgs13on = new Image();
	imgs13on.src = "img/btn_13on.gif";
	

	imgs01off = new Image();
	imgs01off.src = "img/btn_01off.gif";
	imgs02off = new Image();
	imgs02off.src = "img/btn_02off.gif";
	imgs03off = new Image();
	imgs03off.src = "img/btn_03off.gif";
	imgs04off = new Image();
	imgs04off.src = "img/btn_04off.gif";
	imgs05off = new Image();
	imgs05off.src = "img/btn_05off.gif";
	imgs06off = new Image();
	imgs06off.src = "img/btn_06off.gif";
	imgs07off = new Image();
	imgs07off.src = "img/btn_07off.gif";
	imgs08off = new Image();
	imgs08off.src = "img/btn_08off.gif";
	imgs09off = new Image();
	imgs09off.src = "img/btn_09off.gif";
	imgs10off = new Image();
	imgs10off.src = "img/btn_10off.gif";
	imgs11off = new Image();
	imgs11off.src = "img/btn_11off.gif";
	imgs12off = new Image();
	imgs12off.src = "img/btn_12off.gif";
	imgs13off = new Image();
	imgs13off.src = "img/btn_13off.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");
 		}
 	}