/**
 * @author John
 */

<!-- Hide this file from non-JavaScript-supporting browsers!


function LoadRC()
    {
    document.Calculator.VolumeofWater.value = "";
    document.Calculator.VolumeRemoved.value = "";
//	document.Calculator.ConcentrationofContaminant.value = "1";
	document.Calculator.Changes.value = "";

    }


function checkInput(FieldValue, FieldName)
{
	var obj = eval("document.Calculator." + FieldName); 		
		
	 if (FieldValue == "" || FieldValue == null || FieldValue == ".")
	    {
	        alert("Please enter a value");
	    }
	
	 else
	 	{
				
		 	temp = FieldValue;
			if (isNaN(temp))
		    { 
		       alert('Check the input');
		       obj.value = "";
		       obj.focus();
		       return;
		    }
	 	}      
}
function CalculateReduction()
{	
	var a = document.Calculator.VolumeofWater.value;
	var b = document.Calculator.VolumeRemoved.value;
//	var c = document.Calculator.ConcentrationofContaminant.value;
//	if (c == 0)
//	{
	c = 1;
//	}
	var factor;

	factor = (a-b) * c / a;
//		alert ('factor '+factor);
	
	var changes = Math.log(0.5) / Math.log(factor);
	
	changes = Math.ceil(changes);
	if (isNaN(changes))	
		document.Calculator.Changes.value = "Water removed cannot be greater than tank size";
	else
	{
		document.Calculator.Changes.value = changes + " Changes";
	}
		
	return;
	}
-->