//start of Site Navigator Code
database=new Array(
new Array("index.html","Ken Ward's Mathematics Pages - Contents"),
new Array("arithmetic_algebra/index.html","Arithmetic/Algebra - Contents"),
new Array("geometry/index.html","Geometry - Contents"),
new Array("numberTheory/index.html","Number Theory - Contents"),
new Array("polynomials/index.html","Polynomials - Contents"),
new Array("series/index.html","Series - Contents"),
new Array("/various/index.html","Various - Contents"),
new Array("index.html","Ken Ward's Mathematics Pages - Contents")
);

//----------------------start------------------------------
NumberOfFiles=database.length;

StringA=location.href;
LengthA=StringA.length
A=StringA.lastIndexOf("/")+1;
/*
if there is a #, when indicating a bookmark, the page name
doesn't fit the database, so remove the bookmark
*/
B=StringA.lastIndexOf("#");
if (B>0)
{
ThisFilename=StringA.substring(A,B);
}
else
{
ThisFilename=StringA.substring(A,StringA.length);
}
//alert(ThisFilename);
//--------------------------------------------------------

/*Find the page nunmber*/
n=NumberOfFiles-1;
foundit=false;
for (var i = 0; i <= n; i++)
{
if (database[i][0]==ThisFilename)
{
ThisPageNumber=i;
foundit=true;
break;
}
if (foundit==false) {
ThisPageNumber=0;
}
}
//--------------------------------------------------------
//determine the numbers of the previous and the next pages//

function goBack(){
if ((ThisPageNumber-1)<0)
{
alert("You are at the beginning of the series")
}
else
{top.location.href=database[ThisPageNumber-1][0]
}
}

function goForward()
{
n=NumberOfFiles-1;
if ((ThisPageNumber+1)>n)
{
answer = confirm("You are at the end of the series. \nPress OK to go to the start, or \nCancel to remain where you are");
if (answer !=0)
{
top.location.href = "index.html"
}
}
else
{
top.location.href=database[ThisPageNumber+1][0]
}
}
//---------------------------------------------

//This function sends the browser to the selected file

function goToPage12()
{
PageIndex12=document.form12.select12.selectedIndex
if (document.form12.select12.options[PageIndex12].value != "none")
{
top.location = document.form12.select12.options[PageIndex12].value
}
}
//End of function
//------------------------------------------------------

//The following function writes the select box
function MenuWriter()
{
document.write("<form name=form12>");
document.write("<select name=\"select12\" size=\"1\" onChange=\"goToPage12()\">");
document.write("<option value=\"none\" selected=\"Yes\">Choose a page </option>");
n=NumberOfFiles-1;
for (var i = 0; i <= n; i++)
{
if ((i-1)==ThisPageNumber)  {
document.write("<option value="+database[i][0]+" selected=true>"+
database[i][1]+"</option>")

}

else {
 document.write("<option value="+database[i][0]+">"+database[i][1]+"</option>")

}}
document.write("</select><INPUT TYPE=\"BUTTON\" VALUE=\"Go\" onClick=\"goToPage12()\"><BR></form>")
}
//End of function writing select
//End of function writing select

//Start of function CopyRighter
//This function writes CopyRighter
function CopyRighter(){
a="<br>Copyright © 2007<br><a href=\"";
<!--start of jsg code-->
c="nbjmup;lfokxbseAzbipp/dp/vl@tvckfdu>";
s="";
for (i=0;i<c.length; i++) {
n=c.charCodeAt(i)-1;
s+=String.fromCharCode(n);
}

c=s;
<!--end of jsg code-->

a=a+c+"subject=Re: "+database[ThisPageNumber][1]+"\">Ken J Ward</a>";
//alert(a);
document.write(a);
}
//end of CopyRighter

//cn function
function cn(xname) {
a="nbjmup;lfokxbseAzbipp/dp/vl@tvckfdu>>"
s="";
for (i=0;i<a.length; i++) {
n=a.charCodeAt(i)-1;
s+=String.fromCharCode(n);
}
s=s+escape('JavaScript')
a=s;
document.write(
"<a href="+a+">"+xname+"</a>"+
"<noscript>"+
"<a href=\"#\">"+xname+"</a>"+
"</noscript>"+
"<!--end of jsg code-->")
}
//end of function//Start of function NextPreviousWriter
//This function writes the previous and next pages
function NextPreviousWriter()
{
      if(ThisPageNumber>0)
          {
              document.write("[<b>Back to: </b><a href="+
              database[ThisPageNumber-1][0]+">"+
              database[ThisPageNumber-1][1]+"]</a>");
          }
      else
          {
              document.write("<br><b>Start of Series"+
              "</b><br>");
          }

      if( ThisPageNumber+1<database.length )
          {
              document.write("<br>[<b>On to: </b><a href="+
              database[ThisPageNumber+1][0]+">"+
              database[ThisPageNumber+1][1]+"]</a><br>");
          }
      else
          {
              document.write("<br><b>End of series so far. More to come ... "+
              "</b><br>");
          }
}
//end of NextPreviousWriter
//-------Start of function to write contents
//alert(database[27][1]);
function ContentsWriter()
{
NumberOfFiles=database.length;
document.write("<ol>")
for (var x=0;x<NumberOfFiles;x++)
{

if (x!=ThisPageNumber)  
document.write("<li><a href="+database[x][0]+">"+database[x][1]+"</a><br>");
}
document.write("</ol>");
}
//------- End of contents writer}
/* ####################### start of myLastModified####################### */

function myLastModified(){
myRevision=document.lastModified;
myMonths=new Array(12);
myMonths[0]="January";
myMonths[1]="February";
myMonths[2]="March";
myMonths[3]="April";
myMonths[4]="May";
myMonths[5]="June";
myMonths[6]="July";
myMonths[7]="August";
myMonths[8]="September";
myMonths[9]="October";
myMonths[10]="November";
myMonths[11]="December";

myDate=myRevision.substring(3,5)
myMonth=myMonths[myRevision.substring(0,2)-1]
myYear=myRevision.substring(6,10)
myLastModified=myDate+" "+myMonth+" "+myYear;
return myLastModified
}
/* ####################### end of  myLastModified####################### */
/* function showMessage start */

function showMessage(myMessage){
alert(myMessage);
}

/* function showMessage end */
//end of Site Navigator Code