<!-- Author: Brian Mackenzie -->
<!-- Date: 11th March 2004 -->
<!-- Version: 1.0 -->
<!-- Function:  Calculate Resting Daily Energy Expenditure  -->
<!-- Required by: predictrdee.htm -->
<!-- Copyright Brian Mackenzie 2004 -->

function rdeecalculate()
{

var age = document.prdee.age.value;
var height = document.prdee.height.value;
var gender = document.prdee.gender.options[document.prdee.gender.selectedIndex].value;
var wt = document.prdee.wt.value;


if (gender == "male")
  {
    mrdee=66+(13.7*wt)+(5*height)-(6.8*age);   
    document.prdee.rdee.value = nt2dp(mrdee,0);
  }

 if (gender == "female")
  {
   frdee=655+(9.6*wt)+(1.85*height)-(4.7*age);     
   document.prdee.rdee.value = nt2dp(frdee,0);
  }
}

function vclear()
{
  document.prdee.rdee.value = "";
}

function nt2dp(num,dp)
{
<!-- rounds num to dp decimal places -->
  num=num*1+(0.55/Math.pow(10,dp));
  if (dp>0) dp=dp+1;
  b=Math.floor(num).toString().length+dp;
  return num.toString().substr(0,b);
}