function onlyNumbers(evt) {
	var e = evt
	if(window.event){ // IE
		var charCode = e.keyCode;
	} else if (e.which) { // Safari 4, Firefox 3.0.4
		var charCode = e.which
	}
	if (charCode > 31 && (charCode < 48 || charCode > 57))
	return false;
	return true;
}
function resetVal() {
	if(this.value=='0') {
	this.value=''
	}
}
function setVal() {
	if(this.value=='') {
	this.value='0'
	}
}
function budget() {
	var i1 = parseInt(document.budgetForm.i1.value);
	var i2 = parseInt(document.budgetForm.i2.value);
	var i3 = parseInt(document.budgetForm.i3.value);
	var i4 = parseInt(document.budgetForm.i4.value);
	var i5 = parseInt(document.budgetForm.i5.value);
	var i6 = parseInt(document.budgetForm.i6.value);
	var e1 = parseInt(document.budgetForm.e1.value);
	var e2 = parseInt(document.budgetForm.e2.value);
	var e3 = parseInt(document.budgetForm.e3.value);
	var e4 = parseInt(document.budgetForm.e4.value);
	var e5 = parseInt(document.budgetForm.e5.value);
	var e6 = parseInt(document.budgetForm.e6.value);
	var e7 = parseInt(document.budgetForm.e7.value);
	var e8 = parseInt(document.budgetForm.e8.value);
	var e9 = parseInt(document.budgetForm.e9.value);
	var e10 = parseInt(document.budgetForm.e10.value);
	var e11 = parseInt(document.budgetForm.e11.value);
	var e12 = parseInt(document.budgetForm.e12.value);
	var e13 = parseInt(document.budgetForm.e13.value);
	var e14 = parseInt(document.budgetForm.e14.value);
	var e15 = parseInt(document.budgetForm.e15.value);
	var e16 = parseInt(document.budgetForm.e16.value);
	var e17 = parseInt(document.budgetForm.e17.value);
	var e18 = parseInt(document.budgetForm.e18.value);
	var e19 = parseInt(document.budgetForm.e19.value);
	var e20 = parseInt(document.budgetForm.e20.value);
	var e21 = parseInt(document.budgetForm.e21.value);
	var subtotal = (i1+i2+i3+i4+i5+i6);
	var subtotal2 = (e1+e2+e3+e4+e5+e6+e7+e8+e9+e10+e11+e12+e13+e14+e15+e16+e17+e18+e19+e20+e21);
	var total = subtotal - subtotal2;
	document.budgetForm.totalIncome.value = subtotal;
	document.budgetForm.totalExpenses.value = subtotal2;
	document.budgetForm.total.value = total;
}
function mortgageCalc() {
	var rent = parseInt(document.mortgageForm.rent.value);
	var mortgage = (rent * 1.32);
	document.mortgageForm.mortgage.value = mortgage;
}