<!-- 
function calc() {
var energy_field = document.getElementById("energy");
var rescom_field = document.getElementById("rescom");
var voltage1_field = document.getElementById("voltage1");
var voltage2_field = document.getElementById("voltage2");
var savings_field = document.getElementById("savings");

var energy = parseFloat(energy_field.value);
var rescom = parseFloat(rescom_field.value);
var voltage1 = parseFloat(voltage1_field.value);
var voltage2 = parseFloat(voltage2_field.value);
var savings = ((((.8*((voltage1-voltage2)/voltage1))*(rescom/100)*energy)+((.4*((voltage1-voltage2)/voltage2))*((100-rescom)/100)*energy))*1000);

savings_field.value = savings;

savings_field.value = Math.round(savings*100)/100;
}
//   -->