function hide_content(){
		document.getElementById('site_wrapper').style.display="none";
		document.getElementById('site_wrapper_hidden').style.display="block";
}

function show_content(){
		document.getElementById('site_wrapper').style.display="block";
		document.getElementById('site_wrapper_hidden').style.display="none";
}

function hide_content_background(){
		document.getElementById('page').style.background="#fff";
}

function show_content_all(){
		document.getElementById('site_wrapper').style.display="block";
		document.getElementById('site_wrapper_hidden').style.display="block";}