var rate=0.06;
function printRate()
{
	document.write(rate);
}

function Instcalc()
{
	var result ;
	var temp;
	if((document.form.Text1.value=="")||(document.form.Text1.value=="0")||(isNaN(document.form.Text1.value))||(document.form.Text1.value < 0))
 	{
		alert("Please enter a valid amount");
		document.form.Text1.focus();
		 return ;
	}
	if((document.form.Text2.value=="")||(document.form.Text2.value=="0")||(isNaN(document.form.Text2.value))||(document.form.Text2.value < 0))
	{
		alert("Please enter a valid duration");
		document.form.Text2.focus();
		 return ;
	}
	else
	{
 		var amount = eval(document.form.Text1.value);
		var duration = eval(document.form.Text2.value);
		var number = duration * 12;
 		temp = amount * duration * rate;
		result = ( amount + temp ) / number;
		document.form.Text5.value = result;
		document.form.Text1.value = amount;
		document.form.Text2.value = duration;
		document.form.Text3.value = number;
		return ;
 	}
}