function searchExtra(a,b){
if(a.parentNode.parentNode.previousSibling.className=="home-image"){
	var bildDiv=a.parentNode.parentNode.previousSibling;
}
else{	
	var bildDiv=a.parentNode.parentNode.previousSibling.previousSibling;
	if(bildDiv==null){
		var check='unterseite';
		var bildDiv=a.parentNode.parentNode.parentNode.nextSibling.nextSibling;	
	}
}	

	if(b==0){
		if(check=='unterseite'){
			a.setAttribute("onclick","searchExtra(this,1)");
			a.setAttribute("cursor","pointer");
			a.innerHTML="zurück zur Standardsuche";
			var suchDiv=a.parentNode.parentNode;
			suchDiv.style.border="none";
			bildDiv.style.display="none";
			suchDiv.style.width="945px";	
			suchDiv.style.height="auto";	
			suchDiv.style.marginLeft="-670px"
			document.getElementById("extra_search_tab").style.display="block";
		}
		else{
			a.setAttribute("onclick","searchExtra(this,1)");
			a.setAttribute("cursor","pointer");
			a.innerHTML="zurück zur Standardsuche";
			var suchDiv=a.parentNode.parentNode;	
			bildDiv.style.display="none";
			suchDiv.style.width="945px";	
			suchDiv.style.height="auto";	
			document.getElementById("extra_search_tab").style.display="block";
		}
	}
	else{
		if(check=='unterseite'){
			a.setAttribute("onclick","searchExtra(this,0)");
			a.setAttribute("cursor","pointer");
			a.innerHTML="erweiterte Suche";
			var suchDiv=a.parentNode.parentNode;
			suchDiv.style.border="none";
			bildDiv.style.display="block";
			suchDiv.style.width="280px";
			suchDiv.style.height="349px";	
			suchDiv.style.marginLeft="0px"		
			array1=document.getElementById("extra_search_tab").getElementsByTagName("input");
			for(i=0;i<array1.length;i++){
				if(array1[i].checked)
				array1[i].checked=false;
			}
			document.getElementById("extra_search_tab").style.display="none";			
		}
		else{
			a.setAttribute("onclick","searchExtra(this,0)");
			a.setAttribute("cursor","pointer");
			a.innerHTML="erweiterte Suche";
			var suchDiv=a.parentNode.parentNode;
			bildDiv.style.display="block";
			suchDiv.style.width="340px";	
			suchDiv.style.height="349px";	
			array1=document.getElementById("extra_search_tab").getElementsByTagName("input");
			for(i=0;i<array1.length;i++){
				if(array1[i].checked)
				array1[i].checked=false;
			}
			document.getElementById("extra_search_tab").style.display="none";			
		}
	}
}