function onKeyPress()
{
	if ( ( document.getElementById("FromRate").value.length == 0 ) )
		document.getElementById("Calc1").disabled = true;
	else
		document.getElementById("Calc1").disabled = false;

	if ( ( document.getElementById("FromAPR").value.length == 0 ) )
		document.getElementById("Calc2").disabled = true;
	else
		document.getElementById("Calc2").disabled = false;
}