function ShowSubnav (ID) {
	var subnav = document.getElementById("sitemap_"+ID);
	if (subnav) {
		if (subnav.style.display == "block") {
			subnav.style.display = "none";
		} else {
			subnav.style.display = "block";
		}
	}
}

function checkCalPeriod(errorMsg){
	fromDay=document.frmTime.fromD[document.frmTime.fromD.selectedIndex].value;
	fromMonth=document.frmTime.fromM[document.frmTime.fromM.selectedIndex].value;
	fromYear=document.frmTime.fromY[document.frmTime.fromY.selectedIndex].value;
	toDay=document.frmTime.toD[document.frmTime.toD.selectedIndex].value;
	toMonth=document.frmTime.toM[document.frmTime.toM.selectedIndex].value;
	toYear=document.frmTime.toY[document.frmTime.toY.selectedIndex].value;

	fromDate=new Date(fromYear, fromMonth, fromDay, 0, 0, 0);
	toDate=new Date(toYear, toMonth, toDay, 0, 0, 0);
	maxDays=30;
	
	if((toDate.getTime()-fromDate.getTime())>(maxDays*86400000)){
		alert(errorMsg);
		return false;
	}
	return true;
}