var etcOn = false;
function etcSwitch()
{
	var etcObj = document.getElementById("etcObj");
	var etcBtn = document.getElementById("etcBtn");
	etcOn = !etcOn;
	etcPosition();
	if (etcOn)
	{
		etcObj.style.display = "block";
		etcBtn.style.backgroundPosition = "center top";
	}
	else
	{
		etcObj.style.display = "none";
		etcBtn.style.backgroundPosition = "center bottom"; 
	}
}

function etcPosition()
{
	var etcPos = 315;
	var etcObj = document.getElementById("etcObj");
	etcObj.style.left = getBrowserWidth() / 2 + etcPos + "px";
}

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;   
}