function showOrHide(cat)
{
closed_1=document.getElementById('closed_window_header_1');
opened_1=document.getElementById('opened_window_1');
closed_2=document.getElementById('closed_window_header_2');
opened_2=document.getElementById('opened_window_2');
left_menu=document.getElementById('left_menu');
content=document.getElementById('pcontent');


if(cat==1)
	{
	if(closed_1.style.display=='none')
		{
		closed_1.style.display='block';
		opened_1.style.display='none';
		}
	else
		{
		closed_1.style.display='none';
		opened_1.style.display='block';
		closed_2.style.display='block';
		opened_2.style.display='none';
		}
	}
else if(cat==2)
	{
	if(closed_2.style.display=='none')
		{
		closed_2.style.display='block';
		opened_2.style.display='none';
		}
	else
		{
		closed_2.style.display='none';
		opened_2.style.display='block';
		closed_1.style.display='block';
		opened_1.style.display='none';
		}
	}
else if(cat==3)
	{
	content.style.width='95%';
	left_menu.style.left='-235px';
	}
else if(cat==4)
	{
	left_menu.style.display='none';
	content.style.width='100%';
	}
}