function gId(id)
	{
	return document.getElementById(id);
	}
function setMiddleHeight()
	{
	var height = gId('middle').offsetHeight;
	oh = height;
	height = Math.ceil(height / 50) * 50;
	//alert(height + ' ' + oh);
	gId('middle').style.height = height + 'px';
	}

setTimeout('setMiddleHeight()', 500);
setTimeout('setMiddleHeight()', 1000);