// JavaScript Document
function CalcLump(){
	
	var mcurInflation = 1.03
	var mcurGrowth = 1.07
	var curRunningTotal = 0
	
	var curAmount = document.CoverCalc.salary.value
	var nYears = document.CoverCalc.years.value
	var curExisting = document.CoverCalc.existingCover.value
	var curDebts = document.CoverCalc.debts.value
	var curCapital = document.CoverCalc.capital.value
	
	if (isNaN(curExisting) || isNaN(curDebts) || isNaN(curCapital)){	
		alert("There is an incorrect numeric value entered, please try again. Do not enter text or commas into the boxes.");
	}
	else{		
		for (iCount = (nYears - 1); iCount > 0; iCount--)
		{
			curTemp = (curAmount * Math.pow(mcurInflation,iCount))
			curRunningTotal = (curTemp / Math.pow(mcurGrowth,iCount)) + curRunningTotal
		};
	
		curRunningTotal += curDebts - curCapital - curExisting;
		curRunningTotal = Math.round(curRunningTotal);
		document.CoverCalc.LumpSum.value = curRunningTotal + ".00";
	}	
}