// JavaScript Document

function calculate() {
var bmr = document.f.kilos.value / (document.f.metres.value * document.f.metres.value);
var lower = 0;
var upper = 0;
var mid = document.f.month.value;
if (bmr < 18) {
     lower = mid*1.3;
     upper = mid*1.54;
}
if (bmr >= 18 && bmr <=20) {
     lower = mid*1;
     upper = mid*1.3;
}
if (bmr > 20 && bmr <= 23) {
     lower = mid*0.8;
     upper = mid*1.2;
}
if (bmr > 23) {
     lower = mid*0.65;
     upper = mid*0.85;
}
var clk = Math.round(document.f.kilos.value*100);
var clk2 = Math.round(lower*100);
var clk3 = Math.round(upper*100);
document.f.lowerkilos.value = (clk+clk2)/100;
document.f.upperkilos.value = (clk+clk3)/100;

//NEW FOR COOKIES
var expiry = new Date();
expiry.setTime(expiry.getTime() + (300*24*60*60*1000));
document.cookie = "CalcData=" + document.f.kilos.value + "|" + document.f.month.selectedIndex + "|" + document.f.metres.value +  "|" + ";" + "expires=" + expiry.toGMTString() + ";" ;
}