function placeBlocks()
{
	var topObj = document.getElementById("tH");
	var centerObj = document.getElementById("cDecor");
	var bottomObj = document.getElementById("bH");

	var topHeight = 1;
	var bottomHeight = 0;

	var winHeight = getInsideWindowHeight();

	if(centerObj.offsetHeight < winHeight)
	{
		topHeight = Math.floor((winHeight - centerObj.offsetHeight) / 2);
		bottomHeight = winHeight - centerObj.offsetHeight - topHeight;
	}
			
	topObj.style.height = topHeight + "px";
	bottomObj.style.height = bottomHeight + "px";
}

function showLevel()
{
	document.getElementById("info1").style.visibility="visible";
}

function hideLevel()
{
	document.getElementById("info1").style.visibility="hidden";
}

function showManometer()
{
	document.getElementById("info2").style.visibility="visible";
}

function hideManometer()
{
	document.getElementById("info2").style.visibility="hidden";
}


function getInsideWindowHeight() 
{
	var isIE6CSS = (document.compatMode && document.compatMode.indexOf("CSS1") >= 0) ? true : false;
    if (window.innerHeight) 
    {
        return window.innerHeight;
    } 
    else if (isIE6CSS) 
    {
        return document.body.parentElement.clientHeight;
    } 
    else if (document.body && document.body.clientHeight) 
    {
        return document.body.clientHeight;
    }
    return 0;
}