function hideScroll(){
if (im.length<=3){
scrollElem=document.getElementById("scroll");
scrollElem.style.visibility="hidden";

}
}


//Bilder vergrößern

function checkSize(pic){
//originWidth=document.getElementById(pic).width;
//originHeight=document.getElementById(pic).height;

//document.getElementById("bigpic").width=originWidth;
//document.getElementById("bigpic").height=originHeight;

document.getElementById("bigpic").removeAttribute("width");
document.getElementById("bigpic").removeAttribute("height");


if (document.getElementById(pic).width>=471){
document.getElementById("bigpic").width="471";

							if (document.getElementById(pic).height>=270){
							document.getElementById("bigpic").height="270";
							}
}else{

		 if (document.getElementById(pic).height>=270){

		 document.getElementById("bigpic").height="270";
		 
		 }else{
		  document.getElementById("bigpic").height="270";
		 }

}

//Bilder fŸr Safari nach rechts verrŸcken
if(checkBrowserName('safari')){  
//alert('Auf geht\'s zur Safari!');  
//document.getElementById("pic1").style.left=0px;
document.images.eins.style.left=2;
document.images.zwei.style.left=2;
document.images.drei.style.left=2;
}  
}


function image_eins(){

document.images.dia.src=document.images.eins.src; 
checkSize("pic1");
}

function image_zwei(){

document.images.dia.src=document.images.zwei.src; 
checkSize("pic2");
}

function image_drei(){

document.images.dia.src=document.images.drei.src; 
checkSize("pic3");
}

// Bilderleiste scrollen

i = 2;
function vorwaerts() {
 if (i != im.length-1) {
  document.images.eins.src = document.images.zwei.src;
  document.images.zwei.src = document.images.drei.src;
	document.images.drei.src = im[i+1];
	
  i++;
  }
	
	if (i==im.length-1){
	document.images.down.src="../../down2.jpg";
	document.images.up.src="../../up2.jpg";
	}else{
	document.images.down.src="../../down.jpg";
	document.images.up.src="../../up2.jpg";
	
	}
	
	
	
	
 }
function zurueck() {
 if (i != 2) {	
 		document.images.drei.src = document.images.zwei.src;  
		document.images.zwei.src = document.images.eins.src;
    document.images.eins.src = im[i-3];


  i--;
	}
	if(i==2){
		document.images.up.src="../../up.jpg";
		document.images.down.src="../../down.jpg";
	}else{
	document.images.up.src="../../up2.jpg";
	document.images.down.src="../../down.jpg";
	}
  
 }
 
 //Browserweiche
/* User Agent (Browserkennung) auf einen bestimmten Browsertyp prŸfen */  
 function checkBrowserName(name){  
   var agent = navigator.userAgent.toLowerCase();  
 if (agent.indexOf(name.toLowerCase())>-1) {  
     return true;  
  }  
  return false;  
 }