var browserName = navigator.appName;
		var browserVer = parseInt( navigator.appVersion );
		var version = "";

		if ( browserName == "Netscape" && browserVer >= 3 )
				version = "n3";
		else if ( browserName == "Netscape" && browserVer == 2 )
				version = "n2";
		else if 
				( browserName == "Microsoft Internet Explorer" && browserVer >= 4 ) version = "e4";

		else if ( browserName == "Microsoft Internet Explorer" && browserVer >= 2 ) version = "e2";
		else
                version = "other";

        if ( version == "n3" || version == "e4" ) {


				top_1on = new Image (); top_1on.src="images/top_1_on.gif";
				top_1off = new Image (); top_1off.src="images/top_1_off.gif";
				top_2on = new Image (); top_2on.src="images/top_2_on.gif";
				top_2off = new Image (); top_2off.src="images/top_2_off.gif";
				top_3on = new Image (); top_3on.src="images/top_3_on.gif";
				top_3off = new Image (); top_3off.src="images/top_3_off.gif";
				top_4on = new Image (); top_4on.src="images/top_4_on.gif";
				top_4off = new Image (); top_4off.src="images/top_4_off.gif";

				side_1on = new Image (); side_1on.src="images/side_1_on.gif";
				side_1off = new Image (); side_1off.src="images/side_1_off.gif";
				side_2on = new Image (); side_2on.src="images/side_2_on.gif";
				side_2off = new Image (); side_2off.src="images/side_2_off.gif";
				side_3on = new Image (); side_3on.src="images/side_3_on.gif";
				side_3off = new Image (); side_3off.src="images/side_3_off.gif";
				side_4on = new Image (); side_4on.src="images/side_4_on.gif";
				side_4off = new Image (); side_4off.src="images/side_4_off.gif";
				side_5on = new Image (); side_5on.src="images/side_5_on.gif";
				side_5off = new Image (); side_5off.src="images/side_5_off.gif";
				side_6on = new Image (); side_6on.src="images/side_6_on.gif";
				side_6off = new Image (); side_6off.src="images/side_6_off.gif";
				side_7on = new Image (); side_7on.src="images/side_7_on.gif";
				side_7off = new Image (); side_7off.src="images/side_7_off.gif";
				side_8on = new Image (); side_8on.src="images/side_8_on.gif";
				side_8off = new Image (); side_8off.src="images/side_8_off.gif";
				side_9on = new Image (); side_9on.src="images/side_9_on.gif";
				side_9off = new Image (); side_9off.src="images/side_9_off.gif";
				side_10on = new Image (); side_10on.src="images/side_10_on.gif";
				side_10off = new Image (); side_10off.src="images/side_10_off.gif";
				side_11on = new Image (); side_11on.src="images/side_11_on.gif";
				side_11off = new Image (); side_11off.src="images/side_11_off.gif";
				side_12on = new Image (); side_12on.src="images/side_12_on.gif";
				side_12off = new Image (); side_12off.src="images/side_12_off.gif";
				side_13on = new Image (); side_13on.src="images/side_13_on.gif";
				side_13off = new Image (); side_13off.src="images/side_13_off.gif";
				side_14on = new Image (); side_14on.src="images/side_14_on.gif";
				side_14off = new Image (); side_14off.src="images/side_14_off.gif";
				side_13on = new Image (); side_13on.src="images/side_13_on.gif";
				side_13off = new Image (); side_13off.src="images/side_13_off.gif";
				side_14on = new Image (); side_14on.src="images/side_14_on.gif";
				side_14off = new Image (); side_14off.src="images/side_14_off.gif";						
					
    }

function img_act(imgName) {
   if (document.images != null) {
      if ( version == "n3" || version == "e4") {
         imgOn = eval(imgName + "on.src");
         document [imgName].src = imgOn;
      }
   }
}

function img_inact(imgName) {
   if (document.images != null) {
      if ( version == "n3" || version == "e4") {
         imgOn = eval(imgName + "off.src");
         document [imgName].src = imgOn;
      }
   }
}