function decrement() {
	var last = document.lastnext.here.value;
	var volb = document.vols.which.value;
	var siteb=parseInt(last)-1+".php";
	var site=parseInt(last)
	
	if ((volb =="I") && (site=="!=200")) {
	alert('The text in Volume I begins on page 15 and ends on page 171.')
	}
	
	else if ((volb =="I") && (site!="1")) {
	window.location.href="v1-"+siteb; 
	}
	
	else if ((volb =="II") && (site=="11"))  {
	alert('The text in Volume II begins on page 11 and ends on page 193.')
	}
	
	else if ((volb =="II") && (site!="11")) {
	window.location.href="v2-"+siteb; 
	}
	
	else if ((volb =="III") && (site=="11"))  {
	alert('The text in Volume III begins on page 11 and ends on page 182.')
	}
		
	else if ((volb =="III") && (site!="11")) {
	window.location.href="v3-"+siteb; 
	}
}

function increment() {
	var next = document.lastnext.here.value;
	var volf = document.vols.which.value;
	var sitef=parseInt(next)+1+".php";
	var sitek=parseInt(next);
	if (volf=="I") {
	window.location.href="v1-"+sitef;
	}
	else if (volf=="II") {
	window.location.href="v2-"+sitef;
	}
	else if (volf=="III") {
	window.location.href="v3-"+sitef;
	}
}

function showpage() {
	var vol = document.findit.volume;
	var page = document.findit.show.value;
	var vol1 = "v1-";
	var vol2 = "v2-";
	var vol3 = "v3-";
	
	if ((vol[0].checked) && (page<15 || page>171)) {
		alert('The text in Volume I begins on page 15 and ends on page 171.')
		}
	else if ((vol[1].checked) && (page<10 || page>193)) {
		alert('The text in Volume II begins on page 11 and ends on page 193.')
		}
	else if ((vol[2].checked) && (page<11 || page>182)) {
		alert('The text in Volume III begins on page 11 and ends on page 182.')
		}
	
    else if ((vol[0].checked) && (page !="")) {
	window.location.href = vol1+parseInt(page)+".php";
	}
	else if ((vol[1].checked) && (page !="")) {
	window.location.href = vol2+parseInt(page)+".php";
	}
	else if ((vol[2].checked) && (page !="")) {
	window.location.href = vol3+parseInt(page)+".php";
	}
}

function download() {
	chooseVolume=window.open("includes/download.htm","Download","toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,width=245, height=185,x=5,y=275,left=5,top=275")
}