function minus_day() { 
	if (document.all) {
		if (document.short_nav.dd.value > 1) {
			document.short_nav.dd.value = document.all.day.innerText = document.short_nav.dd.value - 1; 
		}
	} else {
		if (document.short_nav.dd.value > 1) {
			i = document.short_nav.dd.value;
			i--;
			document.nsiday.document.nsday.document.write("<span class=\"short-nav\">" + i + "</span>");
			document.nsiday.document.nsday.document.close()
			document.short_nav.dd.value = i; 
		}
	}
}

function plus_day() { 
	if (document.all) {
		if (document.short_nav.dd.value < 31) {
			document.short_nav.dd.value = document.all.day.innerText = Number(document.short_nav.dd.value) + 1; 
		}
	} else {
		if (document.short_nav.dd.value < 31) {
			i = document.short_nav.dd.value;
			i++;
			document.nsiday.document.nsday.document.write("<span class=\"short-nav\">" + i + "</span>");
			document.nsiday.document.nsday.document.close();
			document.short_nav.dd.value = i; 
		}
	}
}

function minus_month(monthsList) { 
	if (document.all) {
		if (document.short_nav.mm.value > 1) {
			document.short_nav.mm.value = document.short_nav.mm.value - 1; 
		} else {
			document.short_nav.mm.value = 12;
			document.short_nav.yyyy.value = document.all.year.innerText = Number(document.short_nav.yyyy.value) - 1;		 
		}
		document.all.month.innerText = monthsList[document.short_nav.mm.value];
	} else {
		i = document.short_nav.mm.value;
		if (i > 1) {
			i--;
		} else {
			i = 12;
			document.short_nav.yyyy.value = Number(document.short_nav.yyyy.value) - 1;
			document.nsiyear.document.nsyear.document.write("<span class=\"short-nav\">" + document.short_nav.yyyy.value + "</span>");
			document.nsiyear.document.nsyear.document.close();	
		}
		document.nsimonth.document.nsmonth.document.write("<span class=\"short-nav\">" + monthsList[i] + "</span>");
		document.nsimonth.document.nsmonth.document.close();
		document.short_nav.mm.value = i;
	}
}

function plus_month(monthsList) { 
	if (document.all) {
		if (document.short_nav.mm.value < 12) {
			document.short_nav.mm.value = Number(document.short_nav.mm.value) + 1; 
		} else {
			document.short_nav.mm.value = 1;
			document.short_nav.yyyy.value = document.all.year.innerText = Number(document.short_nav.yyyy.value) + 1;
		}
		document.all.month.innerText = monthsList[document.short_nav.mm.value];
	} else {
		i = document.short_nav.mm.value;
		if (i < 12) {
			i++;
		} else {
			i = 1;
			document.short_nav.yyyy.value = Number(document.short_nav.yyyy.value) + 1;
			document.nsiyear.document.nsyear.document.write("<span class=\"short-nav\">" + document.short_nav.yyyy.value + "</span>");
			document.nsiyear.document.nsyear.document.close();	
		}
		document.nsimonth.document.nsmonth.document.write("<span class=\"short-nav\">" + monthsList[i] + "</span>");
		document.nsimonth.document.nsmonth.document.close();
		document.short_nav.mm.value = i;
	}
}

function minus_year() { 
	if (document.all) {
		if (document.short_nav.yyyy.value > 2000) {
			document.short_nav.yyyy.value = document.all.year.innerText = Number(document.short_nav.yyyy.value) - 1; 
		}
	} else {
		i = document.short_nav.yyyy.value;
		if (i > 2000) {
			i--;
			document.nsiyear.document.nsyear.document.write("<span class=\"short-nav\">" + i + "</span>");
			document.nsiyear.document.nsyear.document.close();
			document.short_nav.yyyy.value = i; 
		}
	}
}

function plus_year() { 
	var dDate = new Date();
	var dCurYear = dDate.getFullYear();
	if (document.all) {
		if (document.short_nav.yyyy.value <= dCurYear) {
			document.short_nav.yyyy.value = document.all.year.innerText = Number(document.short_nav.yyyy.value) + 1; 
		}
	} else {
		i = document.short_nav.yyyy.value;
		if (i <= dCurYear) {
			i++;
			document.nsiyear.document.nsyear.document.write("<span class=\"short-nav\">" + i + "</span>");
			document.nsiyear.document.nsyear.document.close();
			document.short_nav.yyyy.value = i; 
		}
	}
}