function toggle(id) {
var el = document.getElementById(id);
if ( el.style.display != 'none' ) {
el.style.display = 'none';
}
else {
el.style.display = '';
}
}

function Collapse()
{
	toggle('Content1');
	toggle('Content2');
	toggle('Content3');
	toggle('Content4');
	toggle('Content5');
	toggle('Content6');
}