//ButTrek.js
database=new Array("trek_alg.html","trekl_D.html","trekl_DDR.html","trekl_F.html","trekl_USA.html","trekm_Allis.html","trekm_Allisrep.html","trekm_Case.html","trekm_Caserep.html","trekm_CaseXrep.html","trekm_CaseXrep2.html","trekm_Cockshuttrep.html","trekm_DavidBrep.html","trekm_Deutz.html","trekm_Deutzrep.html","trekm_Eicher.html","trekm_Fendt.html","trekm_Ferguson.html","trekm_Fergusonrep.html","trekm_Ford.html","trekm_Fordrep.html","trekm_Fordrep2.html","trekm_Fordrep3.html","trekm_Fordrep4.html","trekm_Hanomag.html","trekm_Hanomagrep.html","trekm_Inter.html","trekm_Interrep.html","trekm_Interrep2.html","trekm_Interrep3.html","trekm_JohnDeere.html","trekm_JohnDeere2.html","trekm_JohnDrep.html","trekm_JohnDrep2.html","trekm_JohnDrep3.html","trekm_JohnDrep4.html","trekm_JohnDrep5.html","trekm_Kubotarep.html","trekm_Lanz.html","trekm_Lanzrep.html","trekm_MasHar.html","trekm_MasHarrep.html","trekm_Massey.html","trekm_Masseyrep.html","trekm_Masseyrep2.html","trekm_Masseyrep3.html","trekm_MinMolrep.html","trekm_Mitsubrep.html","trekm_Oliverrep.html","trekm_Porsche.html","trekm_Renault.html","trekm_Renault2.html","trekm_Schluter.html","trekm_Someca.html","trekm_Vierzon.html","trekm_Whiterep.html","trekm_Yanmarrep.html","trekt_alg.html","trekt_combines.html","trekt_tech.html","trekt_tech2.html","trektm_motrep.html","trektm_motrep2.html");

NumberOfFiles=database.length;
StringA=window.location.href;
LengthA=StringA.length;
A=StringA.lastIndexOf("/")+1;
ThisFilename=StringA.substring(A,LengthA);
n=NumberOfFiles-1;

for (var z=0;z<=n;z++)
{
if (database[z]==ThisFilename)
{
ThisPageNumber=z;
}
}
function goBack(){
if (ThisPageNumber-1<0)
{
alert("You are at the beginning of the series")
}
else
{window.location=database[ThisPageNumber-1]
}
}
function goForward(){
if (ThisPageNumber+1>n)
{
alert("You are at the end of the series")
}
else
{window.location=database[ThisPageNumber+1]}}