function pol1(el) {return el.offsetLeft + (el.offsetParent ? pol1(el.offsetParent) : 0);} 
function pot1(el) {return el.offsetTop + (el.offsetParent ? pot1(el.offsetParent) : 0);}
function s1(a,x,y,layer) {oa=document.getElementById(a);oim=document.getElementById('im1'); if (!oa.cp) {xim=pol1(oim); xa=pol1(oa); oa.style.left=xim-xa+x+'px'; yim=pot1(oim); ya=pot1(oa); oa.style.top=yim-ya+y+'px'; oa.cp=1;}; oa.style.visibility='visible'; document.getElementById('schlafsystem').src="http://www.samina-augsburg.de/files/images/schichtenaufbau/samina-schlafsystem-"+layer+".jpg";}  
function h1(a) {document.getElementById(a).style.visibility="hidden"; document.getElementById('schlafsystem').src="http://www.samina-augsburg.de/files/images/schichtenaufbau/samina-schlafsystem.jpg";}
function s2(a) {document.getElementById(a).style.visibility='visible'}
function h2(a) {document.getElementById(a).style.visibility='hidden'}