th; i++) {
				unitNode.removeChild(unitNode.childNodes[i]);		
			}
		
			textNode = document.createTextNode(units); 
			unitNode.appendChild(textNode);
		}
	
		function changeUnits(radio_input, units) {
			if (radio_input.checked) {
			
				var elements = document.getElementsByName('coordinate');
				if (elements) {
					for (var i = 0; i < elements.length; i++) {
						convertCoord(elements[i], units);
					}
				}
	
				var elements = document.getElementsByName('units');
				if (elemen