function Is()
{
  browser = navigator.userAgent.toLowerCase();

  this.major = parseInt(navigator.appVersion);
  this.minor = parseFloat(navigator.appVersion);
  this.ns = ((browser.indexOf('mozilla')!=-1) && ((browser.indexOf('spoofer')==-1) && (browser.indexOf('compatible')==-1)));
  this.ie = (browser.indexOf('msie') != -1);
  //checking what kind of browser you've got //

  //netscape ? //
  this.ns2  = (this.ns && (this.major == 2));
  this.ns3  = (this.ns && (this.major == 3));
  this.ns4b = (this.ns && (this.minor < 4.04));
  this.ns4  = (this.ns && (this.major == 4));
  this.ns45 = (this.ns && (this.minor == 4.5));
  this.ns5 = (this.ns && (this.major >= 5));

  //internet explorer ? //
  this.ie3 = (this.ie && (this.major == 2));
  this.ie4 = (this.ie && (this.major == 4));
  this.ie5 = (this.ie && (this.major >= 5));



  // opera //
  this.op3  = (browser.indexOf("opera") != -1);
}


var IsBrowser = new Is();
var img_count = 12;
var img_nr = 1
	img_src = new Array();
	img_src[1] = "content/images/fotos/bild1.jpg";
	img_src[2] = "content/images/fotos/bild2.jpg";
	img_src[3] = "content/images/fotos/bild3.jpg";
	img_src[4] = "content/images/fotos/bild4.jpg";
	img_src[5] = "content/images/fotos/bild5.jpg";
	img_src[6] = "content/images/fotos/bild6.jpg";
	img_src[7] = "content/images/fotos/bild7.jpg";
	img_src[8] = "content/images/fotos/bild8.jpg";
	img_src[9] = "content/images/fotos/bild9.jpg";
	img_src[10] = "content/images/fotos/bild10.jpg";
	img_src[11] = "content/images/fotos/bild11.jpg";
	img_src[12] = "content/images/fotos/bild12.jpg";

	desc = new Array();
	desc[1] = "VS Sonnenschutz #1";
	desc[2] = "VS Sonnenschutz #2";
	desc[3] = "VS Sonnenschutz #3";
	desc[4] = "Lamellenfertigung mit Abstandhalterautomat";
	desc[5] = "Lamellenfertigung mit<br>Lamellenautomat und Stoffschneidemaschine";
	desc[6] = "Rolladenfertigung";
	desc[7] = "Fertigungsstrecke für Außenjalousien mit Rollformen und Stanzautomat";
	desc[8] = "Fertigungsstrecke für Innenjalousien mit modernen Jalousieautomaten und Stanzstrecke";
	desc[9] = "Plisseefertigung mit Stanzeinheit und Zuschneidesystem";
	desc[10] = "Rollofertigung mit automatischem Zuschneidesystem";
	desc[11] = "Moderne Ausstellungs- und Beratungsräume";
	desc[12] = "Schulungsräume für Weiterbildung unserer Händler";

var images = new Array();
var preloadFlag = false;


function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function preloadImages()
{
	if (document.images)
	{
	for (i=1; i <= img_count; i++ )
	{
		images[i] = newImage(img_src[i]);
	}
	preloadFlag = true;
	}
}

function Aendern(text)
{ 
	if (IsBrowser.ie5|| IsBrowser.ns5)
	{
		document.getElementById("info").innerHTML = text;
	}
	else if (IsBrowser.ie4)
	{
		layer_description = eval('document.all["info"]');
		layer_description.innerHTML = text;
	}
	else if (IsBrowser.ns4)
	{
		layer_description = eval('document.layers["info"].document');
		layer_description.open();
		layer_description.write(text);
		layer_description.close();
	}
}

function gallery()
{
	Aendern(desc[1]);
}

function nextimg()
{
	if (preloadFlag)
	{
	img_nr ++
	if (img_nr > img_count) img_nr=1;
	document.img.src = images[img_nr].src
	Aendern(desc[img_nr]);				
	}
}

function previmg()
{
	if (preloadFlag)
	{
	if (img_nr != 1) {
		img_nr --
		document.img.src = images[img_nr].src;
		Aendern(desc[img_nr]);
		}
	if (img_nr == 1) {
		document.img.src = images[img_nr].src;
		Aendern(desc[img_nr]);
		img_nr=img_count+1;
		}
	}

}