run_start_up_banner();

function run_start_up_banner()
{
	if (document.getElementById('start_up_banner'))
	{
		showFog();
		document.getElementById('start_up_banner').style.display = "block";
		document.getElementById('language').style.zIndex = "1";
	}
}

function close_start_up_banner()
{
	if (document.getElementById('start_up_banner'));
	{
		document.getElementById('start_up_banner').style.display = "none";
		hideFog();
		document.getElementById('language').style.zIndex = "300";
	}
}
function showFog()
{	
	if (document.getElementById('fog'))
	{
		arrayPageSize = getPageSize();
		document.getElementById('fog').style.width = arrayPageSize[0] + 'px';
		document.getElementById('fog').style.height = arrayPageSize[1] + 'px';
		document.getElementById('fog').style.display = "block";
	}
}

function hideFog()
{
	if (document.getElementById('fog'))
	{
		document.getElementById('fog').style.display = "none";
	}
}


//
//  getPageSize()
//
function getPageSize() {
		
	 var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = window.innerWidth + window.scrollMaxX;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	
	if (self.innerHeight) {	// all except Explorer
		if(document.documentElement.clientWidth){
			windowWidth = document.documentElement.clientWidth; 
		} else {
			windowWidth = self.innerWidth;
		}
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = xScroll;		
	} else {
		pageWidth = windowWidth;
	}

	return [pageWidth,pageHeight];
}