function showlayer(a){var b=document.getElementById(a).style.display;if(b=="none"){document.getElementById(a).style.display="block"}else{document.getElementById(a).style.display="none"}}function hidelayer(a){var b=document.getElementById(a).style.display;if(b=="none"){document.getElementById(a).style.display="block"}else{document.getElementById(a).style.display="none"}};