function getBrowserHeight() {
	var intH = 0;
	var intW = 0;

	if(typeof window.innerWidth == 'number' ) {
	intH = window.innerHeight;
	intW = window.innerWidth;
	}
	else if(document.documentElement && (document.documentElement.clientWidth || document.documentElement.clientHeight)) {
	intH = document.documentElement.clientHeight;
	intW = document.documentElement.clientWidth;
	}
	else if(document.body && (document.body.clientWidth || document.body.clientHeight)) {
	intH = document.body.clientHeight;
	intW = document.body.clientWidth;
	}
	return { width: parseInt(intW), height: parseInt(intH) };
}

function setLayer_Position() {
	var shadow = document.getElementById('shadow');
	var question = document.getElementById('question');

	var bws = getBrowserHeight();
	shadow.style.width = bws.width + 'px';
	shadow.style.height = bws.height + 'px';
	question.style.left = parseInt((bws.width - 350) / 2)+ 'px';
	question.style.top = parseInt((bws.height - 200) / 2)+ 'px';
	shadow = null;
	question = null;
}

function setLayerPosition(elementID) {
	var shadow = document.getElementById(elementID);
	//shadow.style.width = bws.width + 'px';
	//shadow.style.height = document.body.clientHeight + 'px';
	shadow = null;
}


function showLayer(elementID) {
	setLayerPosition(elementID);

	var shadow = document.getElementById(elementID);

	shadow.style.display = 'block';

	shadow = null;
}

function hideLayer(elementID) {
	var shadow = document.getElementById(elementID);

	shadow.style.display = 'none';

	shadow = null;
}