// Scripts.js	Bruce Arnold Sept 22, 2011
//
// Scripts for moving forward and backward through pages.
// Rev 9/23/2011

	var path
	var index
	var date
	var fivedigits
	var sdate

function monthback()
	{
	path = location.pathname
	index = path.indexOf("Csig")
	fivedigits = "1" + path.substring(index+4, index+8)
	// 1xxxx
	date = parseInt(fivedigits)
	--date
	if ((date % 100) == 0) { date -= 88 }
	// convert back to string 1xxxx, and take last 4 char.
	sdate = String(date)
	// Y2K special case.
	if (sdate != "9912")
		{
		sdate = sdate.substring(1,5)
		}
	parent.location ="Csig" + sdate + ".htm"
	};

function monthforward()
	{
	path = location.pathname
	index = path.indexOf("Csig")
	fivedigits = "1" + path.substring(index+4, index+8)
	// 1xxxx
	date = parseInt(fivedigits)
	++date
	if ((date % 100) == 13) { date += 88 }
	// convert back to string 1xxxx, and take last 4 char.
	sdate = String(date)
	sdate = sdate.substring(1,5)
	parent.location ="Csig" + sdate + ".htm"
	};