   <!-- //NAME:mouse over and out effect button  -->

   browserVer = parseInt(navigator.appVersion);
	var lastActive ="";
   if (browserVer >=4 ) version = "n3";
   else version = "n2"
   if (version=="n3"){

	navbar1on= new Image();navbar1on.src="images/r_timeline_02.jpg";
	navbar1off= new Image();navbar1off.src="images/timeline_02.jpg";

	navbar2on= new Image();navbar2on.src="images/r_timeline_03.jpg";
	navbar2off= new Image();navbar2off.src="images/timeline_03.jpg";

	navbar3on= new Image();navbar3on.src="images/r_timeline_04.jpg";
	navbar3off= new Image();navbar3off.src="images/timeline_04.jpg";

	navbar4on= new Image();navbar4on.src="images/r_timeline_05.jpg";
	navbar4off= new Image();navbar4off.src="images/timeline_05.jpg";

	navbar5on= new Image();navbar5on.src="images/r_timeline_06.jpg";
	navbar5off= new Image();navbar5off.src="images/timeline_06.jpg";

	navbar6on= new Image();navbar6on.src="images/r_timeline_07.jpg";
	navbar6off= new Image();navbar6off.src="images/timeline_07.jpg";

	navbar7on= new Image();navbar7on.src="images/r_timeline_08.jpg";
	navbar7off= new Image();navbar7off.src="images/timeline_08.jpg";

	navbar8on= new Image();navbar8on.src="images/r_timeline_09.jpg";
	navbar8off= new Image();navbar8off.src="images/timeline_09.jpg";

	navbar9on= new Image();navbar9on.src="images/r_timeline_10.jpg";
	navbar9off= new Image();navbar9off.src="images/timeline_10.jpg";

	navbar10on= new Image();navbar10on.src="images/r_timeline_11.jpg";
	navbar10off= new Image();navbar10off.src="images/timeline_11.jpg";

	navbar11on= new Image();navbar11on.src="images/r_timeline_12.jpg";
	navbar11off= new Image();navbar11off.src="images/timeline_12.jpg";

   }
   function img_act(act)  {
   	
	if (lastActive != "") img_inact(lastActive);
	if (version == "n3")   {
	imgOn = eval(act + "on.src");
   	document [act].src = imgOn;
   	lastActive = act;
	}
   }

   function img_inact(imgName)   {

   	if (version == "n3") {
	imgOff = eval(imgName + "off.src");
   	document [imgName].src = imgOff;
	}
   }
<!-- //END:mouse over and out effect button  -->