function VCalculate() 
 
{
   // calculate each line total
   
	 
	myform.totalvalue1.value = Math.round((myform.visits1.value * myform.conversion1.value / 100 * myform.convertedvalue1.value) * 100) / 100
 
	myform.totalvalue2.value = Math.round((myform.visits2.value * myform.conversion2.value / 100 * myform.convertedvalue2.value) * 100) / 100

	myform.totalvalue3.value = Math.round((myform.visits3.value * myform.conversion3.value / 100 * myform.convertedvalue3.value) * 100) / 100
  
	   
      	myform.Valuetotal.value = Math.round((parseFloat(myform.totalvalue1.value)
	+ parseFloat(myform.totalvalue2.value)+ parseFloat(myform.totalvalue3.value)) * 100) / 100

 	myform.Totalvisits.value = parseFloat(myform.visits1.value)
	+ parseFloat(myform.visits2.value)+ parseFloat(myform.visits3.value)
  
 	myform.Averageconversion.value = 
	Math.round((((parseFloat(myform.visits1.value) * parseFloat(myform.conversion1.value) / 100 + 
	parseFloat(myform.visits2.value) * parseFloat(myform.conversion2.value) / 100 + 
	parseFloat(myform.visits3.value) * parseFloat(myform.conversion3.value) / 100) / myform.Totalvisits.value) * 100) * 100) / 100

 	myform.Averagevalue.value = 
	Math.round((myform.Valuetotal.value / 
	(parseFloat(myform.visits1.value) * parseFloat(myform.conversion1.value) / 100 + 
	parseFloat(myform.visits2.value) * parseFloat(myform.conversion2.value) / 100 + 
	parseFloat(myform.visits3.value) * parseFloat(myform.conversion3.value) / 100)) * 100) / 100;

}

function calcbenefits() 
{
	myform.CTotalvisits.value = myform.Totalvisits.value

	myform.Newvisits.value = Math.round(myform.Totalvisits.value * (1 + myform.visitsimprove.value / 100))

	myform.CAverageconversion.value = myform.Averageconversion.value

	myform.NewAverageconversion.value = Math.round(myform.Averageconversion.value * (1 + myform.conversionimprove.value / 100) * 100) / 100

	myform.CValuetotal.value = myform.Valuetotal.value

	myform.NewValuetotal.value = Math.round((myform.Newvisits.value * myform.NewAverageconversion.value / 100 * myform.Averagevalue.value ) * 100) / 100

	myform.Improvement.value = Math.round((myform.NewValuetotal.value - myform.Valuetotal.value) * 100) / 100;

}

function benefitscosts() 

{

	myform.Redevcosts.value = myform.Assesscosts.value * 2
	myform.Totalcosts.value = myform.Assesscosts.value * 3
	myform.Improvement1.value = myform.Improvement.value
	myform.Lifeimprovement.value = Math.round((myform.Improvement.value * myform.improvelifespan.value) * 100) / 100
	myform.Netbenefits.value = Math.round((myform.Lifeimprovement.value - myform.Totalcosts.value) * 100) / 100
	
;
}