function changeNav(id) {
	// HIDE ALL OF THEM
	document.getElementById('static_bottom_1').style.display='none';
	document.getElementById('static_bottom_2').style.display='none';
	document.getElementById('static_bottom_3').style.display='none';
	document.getElementById('static_bottom_4').style.display='none';
	// SHOW ELEMENT
	document.getElementById(id).style.display='block';
}

// Get the window size
function getBrowserWidth()
{
	if (window.innerWidth)
	{
		return window.innerWidth;
	}
	else if (document.documentElement && document.documentElement.clientWidth != 0)
	{
		return document.documentElement.clientWidth;
	}
	else if (document.body)
	{
		return document.body.clientWidth;
	}
	
	return 0;
};

function getBrowserHeight()
{
	if (window.innerHeight)
	{
		return window.innerHeight;
	}
	else if (document.documentElement && document.documentElement.clientHeight != 0)
	{
		return document.documentElement.clientHeight;
	}
	else if (document.body)
	{
		return document.body.clientHeight;
	}
	
	return 0;
};