function OpenNewWindow(url,name,xsize,ysize)
{
		
 	ScreenWidth = screen.width;
	ScreenHeight = screen.height;
	xpos = (ScreenWidth/2)-(xsize/3);
	ypos = (ScreenHeight/2)-(ysize/2);
	NewWindow=window.open(url,name,'height='+ysize+',width='+xsize+',imagetoolbar=no,scrollbars=no,resizable=no,top='+ypos+',left='+xpos+'');
	NewWindow.window.focus();		
	NewWindow.resizeTo(xsize,ysize); 
	
}
	

function textwechsel_1()
	{
	document.getElementById('text1').style.visibility = "visible";
	document.getElementById('text2').style.visibility = "hidden";
	document.getElementById('text3').style.visibility = "hidden";
	document.getElementById('text4').style.visibility = "hidden";
	document.getElementById('bild1').style.visibility = "visible";
	document.getElementById('bild2').style.visibility = "hidden";
	document.getElementById('bild3').style.visibility = "hidden";
	document.getElementById('bild4').style.visibility = "hidden";
	self.location.href='#top';

	}
	
function textwechsel_2()
	{
	document.getElementById('text1').style.visibility = "hidden";
	document.getElementById('text2').style.visibility = "visible";
	document.getElementById('text3').style.visibility = "hidden";
	document.getElementById('text4').style.visibility = "hidden";
	document.getElementById('bild1').style.visibility = "hidden";
	document.getElementById('bild2').style.visibility = "visible";
	document.getElementById('bild3').style.visibility = "hidden";
	document.getElementById('bild4').style.visibility = "hidden";
	self.location.href='#top';
	document.getElementById('nu1').style.backgroundColor = "E1A41C";
	document.getElementById('nu2').style.backgroundColor = "dfdfdf";
	document.getElementById('nu3').style.backgroundColor = "f1f1f1";
	}

function textwechsel_3()
	{
	document.getElementById('text1').style.visibility = "hidden";
	document.getElementById('text2').style.visibility = "hidden";
	document.getElementById('text3').style.visibility = "visible";
	document.getElementById('text4').style.visibility = "hidden";
	document.getElementById('bild1').style.visibility = "hidden";
	document.getElementById('bild2').style.visibility = "hidden";
	document.getElementById('bild3').style.visibility = "visible";
	document.getElementById('bild4').style.visibility = "hidden";
	self.location.href='#top';
	document.getElementById('nu1').style.backgroundColor = "cdcdcd";
	document.getElementById('nu2').style.backgroundColor = "E1A41C";
	document.getElementById('nu3').style.backgroundColor = "f1f1f1";
	}
	
function textwechsel_4()
	{
	document.getElementById('text1').style.visibility = "hidden";
	document.getElementById('text2').style.visibility = "hidden";
	document.getElementById('text3').style.visibility = "hidden";
	document.getElementById('text4').style.visibility = "visible";
	document.getElementById('bild1').style.visibility = "hidden";
	document.getElementById('bild2').style.visibility = "hidden";
	document.getElementById('bild3').style.visibility = "hidden";
	document.getElementById('bild4').style.visibility = "visible";
	self.location.href='#top';
	document.getElementById('nu1').style.backgroundColor = "cdcdcd";
	document.getElementById('nu2').style.backgroundColor = "dfdfdf";
	document.getElementById('nu3').style.backgroundColor = "E1A41C";
	}

//if(top.frames.length<2)location.href="../index.html";