function CalculateValue(target,drag,skid) {
	var targ = document.getElementById(target);
	var lng = parseFloat(document.getElementById(skid).value);
	var codrag = parseFloat(document.getElementById(drag).value);
	
	setDivText(targ, "Estimated vehicle speed is "+(new Number(Math.sqrt(30 * codrag * lng))).toFixed(2)+" mph.");
}
function setDivText(target, text) {
	if (target.hasChildNodes()) { 
		target.replaceChild(document.createTextNode(text), target.firstChild);
	 } else { 
		target.appendChild(document.createTextNode(text));
	}
}