function closeRightFrame()
{
document.getElementById('right_side').style.width='0px';
document.getElementById('right_side').style.height='0px';
document.getElementById('center').style.marginRight='0px';
document.getElementById('page_wrapper').style.backgroundImage="url(images/outr_bg.gif)";
document.getElementById('chiudi').style.visibility='hidden'; 
document.getElementById('chiudi').style.width='0px'; 
document.getElementById('chiudi').style.height='0px';
document.getElementById('apri').style.visibility='visible'; 
document.getElementById('apri').style.width='13px'; 
document.getElementById('apri').style.height='13px';
}

function openRightFrame()
{
document.getElementById('right_side').style.width='174px';
document.getElementById('right_side').style.height='auto';
document.getElementById('center').style.marginRight='196px';
document.getElementById('page_wrapper').style.backgroundImage="url(images/content01_bg.gif)";
document.getElementById('apri').style.visibility='hidden'; 
document.getElementById('apri').style.width='0px'; 
document.getElementById('apri').style.height='0px';
document.getElementById('chiudi').style.visibility='visible'; 
document.getElementById('chiudi').style.width='13px'; 
document.getElementById('chiudi').style.height='13px';
}