window.onscroll = scrollBackToTop;
function scrollBackToTop(){
	var bodyWidth;
	if (typeof window.innerWidth != 'undefined'){bodyWidth = window.innerWidth;}
	else if (typeof document.documentElement != 'undefined' && typeof document.documentElement.clientWidth != 'undefined' && document.documentElement.clientWidth != 0){bodyWidth = document.documentElement.clientWidth;}
	else{bodyWidth = document.getElementsByTagName('body')[0].clientWidth;}
	document.getElementById('backtoTop').style.right=(bodyWidth-1000)/2 + "px";
	var win = window.pageYOffset ? window.pageYOffset : 0;
	var cel = document.documentElement ? document.documentElement.scrollTop : 0;
	var body = document.body ? document.body.scrollTop : 0;
	var result = win ? win : 0;
	if ( cel && ( ! result || ( result > cel ))) result = cel;
	var screenpos = body && ( ! result || ( result > body ) ) ? body : result; 
	if(document.getElementById('whoWeAre').offsetTop == 0){scrollY = document.getElementById('whoWeAre').offsetTop + document.getElementById('whoWeAre').parentNode.offsetTop - 125;}
	else{scrollY = document.getElementById('aboutUS').offsetTop - 125;} 
	if(screenpos>scrollY){
		document.getElementById('backtoTop').style.display="block";
	}
	else{document.getElementById('backtoTop').style.display="none"}
}
function showMap(){
	document.getElementById('mapCanvas').style.display="block";
	document.getElementById('buttons').getElementsByTagName('div')[0].style.display="block";
	document.getElementById('buttons').getElementsByTagName('div')[1].style.display="none";
}