// JavaScript Document
browserName = navigator.appName;
browserVer = parseInt ( navigator.appVersion );

version = "n2";

if ( browserName == "Netscape" && browserVer >= 4 ) version = "n4";
if ( browserName == "Microsoft Internet Explorer" && browserVer >=4 ) version = "e4";

if ( version == "n4" || version == "e4" )
{
	ic1_on = new Image;
	ic1_on.src = "images/ic1_on.png";
	
	ic1_off = new Image;
	ic1_off.src = "images/ic1_off.png";
	
	ic2_on = new Image;
	ic2_on.src = "images/ic2_on.png";
	
	ic2_off = new Image;
	ic2_off.src = "images/ic2_off.png";
	
	ic3_on = new Image;
	ic3_on.src = "images/ic3_on.png";
	
	ic3_off = new Image;
	ic3_off.src = "images/ic3_off.png";
	
	ic4_on = new Image;
	ic4_on.src = "images/ic4_on.png";
	
	ic4_off = new Image;
	ic4_off.src = "images/ic4_off.png";
	
	ic5_on = new Image;
	ic5_on.src = "images/ic5_on.png";
	
	ic5_off = new Image;
	ic5_off.src = "images/ic5_off.png";
	
	ic6_on = new Image;
	ic6_on.src = "images/ic6_on.png";
	
	ic6_off = new Image;
	ic6_off.src = "images/ic6_off.png";
	
	ic7_on = new Image;
	ic7_on.src = "images/ic7_on.png";
	
	ic7_off = new Image;
	ic7_off.src = "images/ic7_off.png";
	
	ic8_on = new Image;
	ic8_on.src = "images/ic8_on.png";
	
	ic8_off = new Image;
	ic8_off.src = "images/ic8_off.png";
	
	start_on = new Image;
	start_on.src = "images/start_on.png";
	
	start_off = new Image;
	start_off.src = "images/start_off.png";
	
	map_on = new Image;
	map_on.src = "images/map_on.png";
	
	map_off = new Image;
	map_off.src = "images/map_off.png";
	
	em_on = new Image;
	em_on.src = "images/em_on.png";
	
	em_off = new Image;
	em_off.src = "images/em_off.png";
	
	tr1_on = new Image;
	tr1_on.src = "images/tr1_on.png";
	
	tr1_off = new Image;
	tr1_off.src = "images/tr1_off.png";
	
	tr2_on = new Image;
	tr2_on.src = "images/tr2_on.png";
	
	tr2_off = new Image;
	tr2_off.src = "images/tr2_off.png";
	
	tr3_on = new Image;
	tr3_on.src = "images/tr3_on.png";
	
	tr3_off = new Image;
	tr3_off.src = "images/tr3_off.png";
	
	tr4_on = new Image;
	tr4_on.src = "images/tr4_on.png";
	
	tr4_off = new Image;
	tr4_off.src = "images/tr4_off.png";
	
	tr5_on = new Image;
	tr5_on.src = "images/tr5_on.png";
	
	tr5_off = new Image;
	tr5_off.src = "images/tr5_off.png";
	
	tr6_on = new Image;
	tr6_on.src = "images/tr6_on.png";
	
	tr6_off = new Image;
	tr6_off.src = "images/tr6_off.png";
	
	back1_on = new Image;
	back1_on.src = "images/back1_on.png";
	
	back1_off = new Image;
	back1_off.src = "images/back1_off.png";
	
	back2_on = new Image;
	back2_on.src = "images/back2_on.png";
	
	back2_off = new Image;
	back2_off.src = "images/back2_off.png";
	
	top_on = new Image;
	top_on.src = "images/top_on.png";
	
	top_off = new Image;
	top_off.src = "images/top_off.png";
			
			
}



function button_on ( imgName )
{
	if ( version == "n4" || version == "e4" )
	{
		butOn = eval ( imgName + "_on.src" );
		document [imgName].src = butOn;
	}
}



function button_off ( imgName )
{
	if ( version == "n4" || version == "e4" )
	{
		butOff = eval ( imgName + "_off.src" );
  	document [imgName].src = butOff;
  }
}