var aaScrollTop; var aaClientHeight;

var encartDiv = document.all ? document.all.Pub : document.getElementById ? document.getElementById("Pub") : document.Pub;
var encartTop = document.all ? document.body.clientHeight : window.innerHeight;
var encartTopTarget = encartTop;
var encartTopInt = encartTop;

function scrollEncart()
{
	if (document.all || document.getElementById)
	{
		aaScrollTop = document.body.scrollTop;
		aaClientHeight = document.body.clientHeight;
		encartTopTarget = Math.max( -50, parseInt(aaClientHeight) - 450 + parseInt(aaScrollTop) );
	}
	else if (document.layers)
	{
		aaScrollTop = window.pageYOffset;
		aaClientHeight = window.innerHeight;
		encartTopTarget = Math.max( -50, aaClientHeight - 450 + aaScrollTop );
	}

	encartTop = ( 9*encartTop + encartTopTarget ) / 10;
	encartTopInt = ( encartTopTarget < encartTop ) ? Math.floor(encartTop) : Math.ceil(encartTop);

	if (document.all || document.getElementById)
	{
		encartDiv.style.top = encartTopInt;
	}
	else if (document.layers)
	{
		encartDiv.top = encartTopInt;
	}
}

setInterval("scrollEncart()",10);