function enlarge()
{
	var popup = document.getElementById('popup');
	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 = (document.documentElement.scrollTop + document.documentElement.clientHeight/2 - popup.clientHeight/2) + 'px';
	popup.style.left = (document.documentElement.scrollLeft + document.documentElement.clientWidth/2 - popup.clientWidth/2) + 'px'; 

}

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