<!--
// Set the style references for the objects
if(document.getElementById){
   layerRef = "document.getElementById('"; 
   styleRef = ".innerHTML";
   endLayerRef = "')";
} else {
   layerRef = "document.all['"; 
   styleRef = ".innerHTML";
   endLayerRef = "']";
}

function calculateFlushes(){
  var numFlushes = document.calculator.flushes.value;
  var numSewer = document.calculator.sewer.value;
  var numWaterSaved = 0;
  var numSavings = 0;
  
  numWaterSaved = (numFlushes * .75) * 360;
  numSavings = (numWaterSaved / 1000) * numSewer;
  
	// Display SubTotal
	//subtotal = subtotal.toFixed(2);
	eval(layerRef + 'calculation' + endLayerRef + styleRef + '="$' + numSavings.toFixed(2) + ' per fixture!"');	
}

// Create a function to ensure numeric values
function validate(field) {
	var valid = ".0123456789"
	var ok = "yes";
	var temp;
		for (var i = 0; i < field.value.length; i++) {
			temp = "" + field.value.substring(i, i+1);
			if (valid.indexOf(temp) == "-1") ok = "no";
		}
	if (ok == "no") {
		alert("Please enter a number in the quantity box.\nPlease take out the dollar sign $ if you are using it.\nThis calculator cannot process letters or symbols.");				
		field.value = 0;
	}
	calculateFlushes();
}
// -->