function getWindowHeight()
{
	var windowHeight = 0;
	if (typeof(window.innerHeight) == 'number')
	{
		windowHeight = window.innerHeight;
	}
	else 
	{
		if (document.documentElement && document.documentElement.clientHeight)
		{
			windowHeight = document.documentElement.clientHeight;
		}
		else 
		{
			if (document.body && document.body.clientHeight)
			{
				windowHeight = document.body.clientHeight;
			}
		}
	}
	return windowHeight;
}
function setContent()
{
	if (document.getElementById)
	{
		var windowHeight = getWindowHeight();
		if (windowHeight > 0)
		{
			var contentElement = document.getElementById('vcontainer');
			var contentHeight = contentElement.offsetHeight;
			if (windowHeight - contentHeight > 0)
			{
				contentElement.style.position = 'relative';
				contentElement.style.top = ((windowHeight / 2) - (contentHeight / 2)) + 'px';
			}
			else
			{
				contentElement.style.position = 'static';
			}
			contentElement.style.visibility='visible';
		}
	}
}
window.onload = function()
{
	setContent();
}
window.onresize = function()
{
	setContent();
}
setContent();