var xPos
pageList=new Array("ac","dg","hk","ln","or","sz")
function changePage(move) {
	hrefString=document.location.href.toLowerCase()
	suffixPos=hrefString.indexOf('.htm')
	pageVal=hrefString.substr(suffixPos-2,2)
	for (thisPage=0; thisPage<pageList.length; thisPage++) {
		if (pageVal==pageList[thisPage]) break
		}
	thatPage=thisPage+move
	if (thatPage<0||thatPage>=pageList.length) return
	pageName="bib-"+pageList[thatPage]+".htm"
	document.location.href=pageName
	}
function getLetter() {
	letterRank=Math.floor(xPos/16)
	letterVal=String.fromCharCode(letterRank+65)
	pageVal="ac" // default
	for(var i=1; i<pageList.length; i++) {
		pageLetter=pageList[i].charAt(0).toUpperCase()
		if (letterVal>=pageLetter) { pageVal=pageList[i] }
		}
	pageName="bib-"+pageVal+".htm#"+letterVal
	document.location.href=pageName
	}