function doHover(id,bild)
{
    if (welcherBrowser() != 'IE')
    {
        var bildTag;
        bildTag = document.getElementById(id);
        bildTag.src = bild;
    }
}
function doHover2(id,bild, bild2)
{
    
 var bildTag;
 bildTag = document.getElementById(id);
 bildTag.src = bild;
 
 var testTag;
 testTag = document.getElementById('Bildteaser');
 testTag.src=bild2;
 
}

function updateRahmen(bild)
{

    if (welcherBrowser() != 'IE')
    {
        var bildTag;
        bildTag = document.getElementById('Bildteaser');
        bildTag.src=bild;
    }

}

function showDiv(id)
{
   var tag;
   var displayVal;
   tag = document.getElementById(id);
   displayVal = tag.style.display;
   if (displayVal == 'none')
   {
   	tag.style.display = 'block';
   }
   else
   {
   	tag.style.display = 'none';
   }


}
function preCache()
{
   var preCacheHomeBlack = new Image();
   var preCacheHomeRed = new Image();

   preCacheHomeBlack.src = "images/home-black.png";
   preCacheHomeRed.src = "images/home-red.png"
   
   var preCacheAboutBlack = new Image();
   var preCacheAboutRed = new Image();

   preCacheAboutBlack.src = "images/about-black.png";
   preCacheAboutRed.src = "images/about-red.png"
   
   var preCacheArtworkBlack = new Image();
   var preCacheArtworkRed = new Image();

   preCacheArtworkBlack.src = "images/artwork-black.png";
   preCacheArtworkRed.src = "images/artwork-red.png"
   
   var preCacheLinksBlack = new Image();
   var preCacheLinksRed = new Image();

   preCacheLinksBlack.src = "images/links-black.png";
   preCacheLinksRed.src = "images/links-red.png"
   
   var preCacheGbookBlack = new Image();
   var preCacheGbookRed = new Image();
   
   preCacheGbookBlack.src = "images/gbook-black.png";
   preCacheGbookRed.src = "images/gbook-red.png"
   
   var preCacheBildHome = new Image();
   var preCacheBildAbout = new Image();
   var preCacheBildArtwork = new Image();
   var preCacheBildLinks = new Image();
   var preCacheBildGbook = new Image();
   
   preCacheBildHome.src = "images/bild-home.png";
   preCacheBildAbout.src = "images/bild-about.png";
   preCacheBildArtwork.src = "images/bild-artwork.png";
   preCacheBildLinks.src = "images/bild-links.png";
   preCacheBildGbook.src = "images/bild-gbook.png";

}

function welcherBrowser() 
{
	var browser = '';
	var useragent = navigator.userAgent;
	var BrowserName = (useragent.indexOf('Opera') > -1) ? 'Opera' : navigator.appName;
	var pos = useragent.indexOf('MSIE');
	if (pos > -1) 
	{
		BrowserVersion = useragent.substring(pos + 5);
		var pos = BrowserVersion.indexOf(';');
		var BrowserVersion = BrowserVersion.substring(0,pos);
		browser = 'IE';
	}
	var pos = useragent.indexOf('Opera');
	if (pos > -1) 
	{
		BrowserVersion = useragent.substring(pos + 6);
		var pos = BrowserVersion.indexOf(' ');
		var BrowserVersion = BrowserVersion.substring(0, pos);
		browser = 'Opera';
	}
	if (BrowserName == "Netscape") 
	{
		var BrowserVersion = useragent.substring(8);
		var pos = BrowserVersion.indexOf(' ');
		var BrowserVersion = BrowserVersion.substring(0, pos);
		browser = 'Netscape4';
	}
	if (BrowserName == "Netscape" && parseInt(navigator.appVersion) >= 5) 
	{
		var pos = useragent.lastIndexOf('/');
		var BrowserVersion = useragent.substring(pos + 1);
		browser = 'Netscape';
	}
	if (BrowserName == "Konqueror")
	{
		browser = 'Konqueror';
	}
	return browser;
}