function gradient(id, level)
{
	var box = document.getElementById(id);
	box.style.opacity = level;
	box.style.MozOpacity = level;
	box.style.KhtmlOpacity = level;
	box.style.filter = "alpha(opacity=" + level * 100 + ")";
	
	if(level > 0.01)
	{
		box.style.display="block";
	}
	else
	{
		box.style.display="none";
	}
	return;
}


function fadeout(id) 
{
	var level = document.getElementById(id).style.opacity;
	while(level > 0)
	{
		setTimeout( "gradient('" + id + "'," + level + ")", ((1-level)* 500) + 10);
		level -= 0.01;
	}
}
function fadein(id, max) 
{
	var level = 0.01;
	while(level <= max)
	{
		setTimeout( "gradient('" + id + "'," + level + ")", (level* 1000) + 10);
		level += 0.01;
	}
}

function openbox()
{
	var box = document.getElementById('box'); 
	
	gradient("filter", 0);
	fadein("filter", 0.7);
	
	gradient("box", 0);
	fadein("box", 1);
	
}


function closebox()
{
	fadeout("filter");
	fadeout("box");
}