//function hide(){
//this hide function is in the bodyOnloadHideAll function for the to work with multiple onload functions
//document.getElementById("result").innerHTML = "";
//}
function calculate() {
// Get the user's input from the form. Assume it is all valid.
// Convert interest from a percentage to a decimal, and convert from
// an annual rate to a monthly rate. Convert payment period in years
// to the number of monthly payments.
var miles = document.covinfo.miles.value;
var currentMPG = document.covinfo.currentMPG.value;
var newMPG = document.covinfo.newMPG.value;
var gasPrice = document.covinfo.gasPrice.value;
var currentCost = (miles/currentMPG)*gasPrice;
var newCost = (miles/newMPG)*gasPrice;
var savings = currentCost - newCost;
// Check that the result is a finite number. If so, display the results
if (!isNaN(savings) && (savings != Number.POSITIVE_INFINITY) && (savings != Number.NEGATIVE_INFINITY)
&& !isNaN(currentCost) && (currentCost != Number.POSITIVE_INFINITY) && (currentCost != Number.NEGATIVE_INFINITY)
&& !isNaN(newCost) && (newCost != Number.POSITIVE_INFINITY) && (newCost != Number.NEGATIVE_INFINITY)
) {
//show results in div
//document.getElementById("result").innerHTML = "Your result is "+round((monthly * payments) - principal);
document.getElementById("result").innerHTML = "Gas for your current vehicle costs $"+round(currentCost)+".
Gas for the new vehicle will cost $"+round(newCost)+".
You will save $"+round(savings)+" per year on gas";
}
// Otherwise, the user's input was probably invalid, so don't
// display anything.
else {
document.getElementById("result").innerHTML = "Please check your values for a proper calculation ";
}
}
function addCommas(nStr)
{
nStr += '';
x = nStr.split('.');
x1 = x[0];
x2 = x.length > 1 ? '.' + x[1] : '';
var rgx = /(\d+)(\d{3})/;
while (rgx.test(x1)) {
x1 = x1.replace(rgx, '$1' + ',' + '$2');
}
return x1 + x2;
}
function round(x) {
// This simple method rounds a number to two decimal places.
//return Math.round(x*100)/100;
//rounds up to a whole number
return Math.round(x);
}