Question

I am working on learning to make forms using HTML and Javascript. When I go to submit my form, it processes it, and I can see the result, but the page quickly resets so that the form is back to its starting state. How can I make sure the page doesn’t reset when the function is done?

Here is the HTML for the form and the function that processes it:

<form name="calculator" onsubmit="return calculate(this);">
            Enter the value of the house: $
            <input type="text" name="homeValue" id="homeValue" size="7" /><br>
            <select name="selMortgage" id="selMortgage">
                <option>Select a mortgage length</option>
                <option>15-year mortgage</option>
                <option>30-year mortgage</option>
            </select></br>
            <p class="form"><input type="checkbox" name="chkDiscount" value="discount"/>Good Credit Discount?</p>
            <input type="submit" value="Calculate" />
            <div id="result"></div>
</form>

function calculate(form) {
    var amountEntered = form.homeValue.value;
    var termLength;
    var interestRate;
    var calc;
    document.getElementById("result").innerHTML = "hi";
    if (!/^\d+(\.\d{1,2})?$/.test(amountEntered))
    {
        alert("You did not enter an amount of money");
        //form.homeValue.focus();
        return;
    }
    if (form.chkDiscount.checked == true)
    {
        interestRate = .05;
    }
    else
    {
        interestRate = .06;
    }
    if (form.selMortgage.selectedIndex == 0)
    {
        alert("Select a mortgage length");
    }
    else if (form.selMortgage.selectedIndex == 1)
    {
        termLength = 15;
    }
    else if (form.selMortgage.selectedIndex == 2)
    {
        termLength = 30;
    }
    calc = (Math.pow(1+interestRate,termLength) * amountEntered)/(termLength*12);
    document.getElementById("result").innerHTML = calc.toFixed(2);
}

Answer 1

It looks like you are missing a return false.