//determine menu images - current country has roll-over image always
	var sPeriod = "";
	if (document.frmVar.txtPeriod)
		sPeriod = document.frmVar.txtPeriod.value;
	var sLink = "timeperiod_japan.jsp?ctry=Japan&pd=";
	
	var sMenuClass = "timeperiodmenu";
	var sMenuSelectedClass = "timeperiodmenuselected";
	//Period Menu select - default class for the <a href> tag
	var sClsJomon = sMenuClass;
	var sClsKofun = sMenuClass;
	var sClsHeian = sMenuClass;
	var sClsKamakura = sMenuClass;
	var sClsMomoyama = sMenuClass;
	var sClsMeiji = sMenuClass;
	var sClsModern = sMenuClass;
	
	if (sPeriod == "Jomon|Yayoi")
		sClsJomon  = sMenuSelectedClass; 
	else if (sPeriod == "Kofun|Asuka|Hakuho|Nara")
		sClsKofun = sMenuSelectedClass; 
	else if (sPeriod == "Heian")
		sClsHeian = sMenuSelectedClass; 
	else if (sPeriod == "Kamakura|Nanbokucho|Muromachi")
		sClsKamakura = sMenuSelectedClass;
	else if (sPeriod == "Momoyama|Kan'ei|Edo")
		sClsMomoyama = sMenuSelectedClass;
	else if (sPeriod == "Meiji")
		sClsMeiji = sMenuSelectedClass;
	else if (sPeriod == "Modern")
		sClsModern = sMenuSelectedClass;

	document.write('<td height="20" colspan="3" style="background-color: #999966;">'
  + '		<a href="' + sLink + escape('J&#333;mon|Yayoi') + '" class="' + sClsJomon + '">J&#333;mon/Yayoi</a>'
  + '		<a href="' + sLink + escape('Kofun|Asuka|Hakuh&#333;|Nara') + '" class="' + sClsKofun + '">Kofun/Asuka/Hakuh&#333;/Nara</a>'
  + '		<a href="' + sLink + escape('Heian') + '" class="' + sClsHeian + '">Heian</a>'
  + '		<a href="' + sLink + escape('Kamakura|Nanbokuch&#333;|Muromachi') + '" class="' + sClsKamakura + '">Kamakura/Nanbokuch&#333;/Muromachi</a>'
  + '		<a href="' + sLink + escape('Momoyama|Kan\'ei|Edo') + '" class="' + sClsMomoyama + '">Momoyama/Edo</a>'
  + '		<a href="' + sLink + escape('Meiji') + '" class="' + sClsMeiji + '">Meiji</a>'
  + '		<a href="' + sLink + escape('Modern') + '" class="' + sClsModern + '">Modern</a>'
  + '	</td>');