function roundNumber(num, dec) {
	var result = Math.round(num*Math.pow(10,dec))/Math.pow(10,dec);
	return result;
}

function inmonth(freq, amt, row) { //dropdown freq, amount value, row number
	var output;
	switch (freq) {
		case "annual":
			output = amt/12;
			break;
		case "month":
			output = amt;
			break;
		case "fortnight":
			output = amt*2;
			break;
		case "weekly":
			output = amt*4;
			break;
		default:
			break;
	}
	output = roundNumber(output,2);
	document.getElementById('inmonth'+row).value = output;
}

function inyear(freq, amt, row) {
	var output;
	switch (freq) {
		case "annual":
			output = amt;
			break;
		case "month":
			output = amt*12;
			break;
		case "fortnight":
			output = amt*26;
			break;
		case "weekly":
			output = amt*52;
			break;
		default:
			break;
	}
	output = roundNumber(output,2);
	document.getElementById('inannual'+row).value = output;
}

function expmonth(freq, amt, row) { //dropdown freq, amount value, row number
	var output;
	switch (freq) {
		case "annual":
			output = amt/12;
			break;
		case "month":
			output = amt;
			break;
		case "fortnight":
			output = amt*2;
			break;
		case "weekly":
			output = amt*4;
			break;
		default:
			break;
	}
	output = roundNumber(output,2);
	document.getElementById('expmonth'+row).value = output;
}

function expyear(freq, amt, row) {
	var output;
	switch (freq) {
		case "annual":
			output = amt;
			break;
		case "month":
			output = amt*12;
			break;
		case "fortnight":
			output = amt*26;
			break;
		case "weekly":
			output = amt*52;
			break;
		default:
			break;
	}
	output = roundNumber(output,2);
	document.getElementById('expannual'+row).value = output;
}

function calcincome() {
	var totalmonth=0;
	var totalyear=0;
	var abc;
	for (i=1; i<6; i++) { // calculate monthly amount
		inmonth(document.getElementById('infreq'+i).value, document.getElementById('inamount'+i).value, i);
	}
	for (i=1; i<6; i++) { // calculate yearly amount
		inyear(document.getElementById('infreq'+i).value, document.getElementById('inamount'+i).value, i);
	}
	for (i=1; i<6; i++) { // calculate total monthly amount
		abc = parseInt(document.getElementById('inmonth'+i).value);
		totalmonth = totalmonth + abc;
	}
	document.getElementById('inmonthtotal').value = totalmonth;
	for (i=1; i<6; i++) { // calculate total yearly amount
		abc = parseInt(document.getElementById('inannual'+i).value);
		totalyear = totalyear + abc;
	}
	document.getElementById('inannualtotal').value = totalyear;
}


function calcexpense() { //calculate total of expenses
	var totalmonth=0;
	var totalyear=0;
	var abc;
	for (i=1; i<31; i++) { // calculate monthly amount
		expmonth(document.getElementById('expfreq'+i).value, document.getElementById('expamount'+i).value, i);
	}
	for (i=1; i<31; i++) { // calculate yearly amount
		expyear(document.getElementById('expfreq'+i).value, document.getElementById('expamount'+i).value, i);
	}
	for (i=1; i<31; i++) { // calculate total monthly amount
		abc = parseInt(document.getElementById('expmonth'+i).value);
		totalmonth = totalmonth + abc;
	}
	document.getElementById('expmonthtotal').value = totalmonth;
	for (i=1; i<31; i++) { // calculate total monthly amount
		abc = parseInt(document.getElementById('expannual'+i).value);
		totalyear = totalyear + abc;
	}
	document.getElementById('expannualtotal').value = totalyear;
}

function calcsaveamt() { // Calculate total saved amount
	var sinmonth = 0;
	var sexpmonth = 0;
	var sinannual = 0;
	var sexpannual = 0;
	var savemonthamt = 0;
	var saveannualamt = 0;
	
	sinmonth = parseInt(document.getElementById('inmonthtotal').value);
	sexpmonth = parseInt(document.getElementById('expmonthtotal').value);
	
	sinannual = parseInt(document.getElementById('inannualtotal').value);
	sexpannual = parseInt(document.getElementById('expannualtotal').value);
	
	savemonthamt = sinmonth - sexpmonth;
	saveannualamt = sinannual - sexpannual;
	
	document.getElementById('savemonth').value = savemonthamt;
	document.getElementById('saveannual').value = saveannualamt;
}