function swapImage(imgId, imgSrc) {
	var d = document.getElementById(imgId);
  	d.src = imgSrc;
}

function wYear() {
	var d=new Date();
	yr=d.getFullYear();
	document.write(yr);
}

function showMeter() {
	var d = document.getElementById('meter');
	d.style.display='block';
}

function changesDisplay(obj, value) {
	var d= document.getElementById(obj);
	d.style.display = value;
}