function calculate_cagr ( start_value, end_value, time_periods )
{
	var base = end_value / start_value;
	var exponent = ( 1 / time_periods );
	var cagr = ( Math.pow( base, exponent ) - 1 ) * 100;
        var cagrReportDiv= document.getElementById("CagrReport");
	cagrReportDiv.innerHTML = "<table border=\"1\">"
				  + "<tr><th>Annual Return Required:  </th>" 
				  + "<td>" + cagr.toFixed(2) 
				  + "%</td></tr></table>";
}

function get_cagr_input ( form )
{
	var start_value = form.start_value.value;
	var end_value = form.end_value.value;
	var time_periods = form.time_periods.value;
	calculate_cagr( start_value, end_value, time_periods );
}