function toggleLayer(whichLayer){var elem,vis;if(document.getElementById){elem=document.getElementById(whichLayer)}else{if(document.all){elem=document.all[whichLayer]}else{if(document.layers){elem=document.layers[whichLayer]}}}vis=elem.style;if(vis.display==""&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined){vis.display=(elem.offsetWidth!=0&&elem.offsetHeight!=0)?"block":"none"}vis.display=(vis.display==""||vis.display=="block")?"none":"block";if(vis.display=="block"){toggleImage(whichLayer,true)}else{toggleImage(whichLayer,false)}}function toggleImage(whichLayer,onstate){var id="imgQA"+whichLayer.substr(6);var img=document.getElementById(id);if(onstate){img.src="/images/misc/arrow-down.png"}else{img.src="/images/misc/arrow-right.png"}};