function mostra(div_name,index,el){mostraAttivo(el);indice=index;if(document.getElementById){document.getElementById('content').innerHTML=document.getElementById('d'+div_name).innerHTML;myGallerySet.changeGallery(index);return false;}
else{return true;}}
function centra(){if(document.getElementById){var alto=document.getElementById('alto');alto.style.height=Math.floor((screen.availHeight-900)/2,0)+'px';}
else{return true;}}
function mostraAttivo(el){var links=el.parentNode.parentNode.getElementsByTagName('a');for(var i=0;i<links.length;i++){links[i].className='';}
el.className='nav_menu_attivo';el.blur();return false;}