function changeVisibility(co,force,test)
{
	co=document.getElementById(co);
    if (test>0 || test<0) {
		if (force!=test) {co.style.display='none';} else {co.style.display='';}
    }
    else if (force=='') {
		co.style.display=='none' ? co.style.display='' : co.style.display='none';
	}
	else {
		force==true ? force='hide' : force='show';
		if (force=='show') {co.style.display='';}
		else if (force=='hide') {co.style.display='none';}
	}
}


function setCookie(name, value, expires)
{
	var today = new Date();
	today.setTime( today.getTime() );

	if ( expires )
	{
		expires = expires * 1000 * 60 * 60 * 24;
	}
	var expires_date = new Date( today.getTime() + (expires) );

	document.cookie = name + "=" +escape( value ) +
	( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" );
}



function changeVisibilityAndSave(co,force,test)
{
	changeVisibility(co,force,test);
	
	co=document.getElementById(co);
	setCookie(co.id, co.style.display, 365);
	
	if (co.style.display=='none') {
		document.getElementById('updates_show_hide').innerHTML='Wiêcej &raquo;';}
	else {
		document.getElementById('updates_show_hide').innerHTML='Mniej &laquo;';}
}