// JavaScript Document

var kategorie;
var nr;
var anzahl;




function changepix(richtung)
{
	if (richtung<0)
	//zurück
	{
		nr=nr-1;
		document.getElementById("mainpix").src="images/mainpix/"+kategorie+"_"+nr+".JPG";

		if (nr==1)
		{document.getElementById("backward_button").style.visibility='hidden';}
		if (nr==anzahl-1)
		{document.getElementById("forward_button").style.visibility='visible';}

}
	else
	// vorwärts
	{			
		nr=nr+1;
		document.getElementById("mainpix").src="images/mainpix/"+kategorie+"_"+nr+".JPG";
	
		if (nr==anzahl)
		{document.getElementById("forward_button").style.visibility='hidden';}
		if (nr==2)
		{document.getElementById("backward_button").style.visibility='visible';}

	}
}
function show_moreinfo()
{
	document.getElementById("moreinfo2").style.visibility="hidden";
	if (!(document.getElementById("moreinfo").style.visibility=="visible"))
	{
	document.getElementById("moreinfo").style.visibility="visible";
	}
	else
	{
	document.getElementById("moreinfo").style.visibility="hidden";
	}
}
function show_moreinfo2()
{
	document.getElementById("moreinfo").style.visibility="hidden";
	if (!(document.getElementById("moreinfo2").style.visibility=="visible"))
	{
	document.getElementById("moreinfo2").style.visibility="visible";
	}
	else
	{
	document.getElementById("moreinfo2").style.visibility="hidden";
	}
}
function setKat(kat,anz,start)
{
	kategorie=kat;
	anzahl=anz;
	nr=1;
	if (start)
	{
	document.getElementById("mainpix").src="images/mainpix/welcome2.jpg";
	}
	else
	{
	document.getElementById("mainpix").src="images/mainpix/"+kategorie+"_"+nr+".JPG";
	}
	document.getElementById("backward_button").style.visibility='hidden';
}