function enlarge(popup_id)
{
	var popup = document.getElementById(popup_id);
	var fader = document.getElementById('fader');



	fader.style.width = document.documentElement.scrollWidth+'px';
	fader.style.height = document.documentElement.scrollHeight+'px';
	
	popup.style.display = 'block';
	fader.style.display = 'block';
	popup.style.top = 0;
	popup.style.left = (document.documentElement.scrollLeft + document.documentElement.clientWidth/2 - popup.clientWidth/2) + 'px';
}

function hide(popup_id)
{
	var popup = document.getElementById(popup_id);
	var fader = document.getElementById('fader');	
	
	popup.style.display = 'none';
	fader.style.display = 'none';		
}