Html/Javascript form calculation and validation in new page

Question

I'm working on a website project and really need help as I'm new to all this. I'm basically given values to every option in the drop down menu's and make them add together which I've managed. But then I want to the total value from the menus to then be the range for a pseudo random to be a generated and added to the age I input.

When I hit submit I'd like it to calculate all that and display the result on a new page. I want to be able to do all this within javascript and html.

Any help would be greatly appreciated! My coding is below. Thanks so much!

        <body>
        <form id="form1" action="" method="post" onsubmit="return calcTotal(this)">
        <select name=select1>
            <option selected="selected" value="0">Chinese Zodiac</option>
        <option value="3">Rat</option>
        <option value="3">Ox</option>
        <option value="4">Tiger</option>
        <option value="2">Rabbit</option>
        <option value="4">Dragon</option>
        <option value="5">Snake</option>
        <option value="3">Horse</option>
        <option value="3">Sheep</option>
        <option value="4">Monkey</option>
        <option value="5">Rooster</option>
        <option value="3">Dog</option>
        <option value="3">Pig</option>
        </select>
        </select>
        <br />
        <select name=select2>
            <option selected="selected" value="0">Star Sign</option>
        <option value="2">Aries</option>
        <option value="4">Taurus</option>
        <option value="3">Gemini</option>
        <option value="4">Cancer</option>
        <option value="3">Leo</option>
        <option value="2">Virgo</option>
        <option value="2">Libra</option>
        <option value="3">Scorpio</option>
        <option value="2">Sagittarius</option>
        <option value="4">Capricorn</option>
        <option value="2">Aquarius</option>
        <option value="3">Pisces</option>
        </select>
        <br />

        <select name=select3>
            <option selected="selected" value="0">Blood Type</option>
        <option value="3">O</option>
        <option value="2">A</option>
        <option value="1">B</option>
        <option value="3">AB</option>
        </select>
        <br />

        <select name=select4>
            <option selected="selected" value="0">Favourite Colour</option>
        <option value="3">Black</option>
        <option value="3">Blue</option>
        <option value="2">Brown</option>
        <option value="2">Green</option>
        <option value="3">Orange</option>
        <option value="3">Pink</option>
        <option value="2">Purple</option>
        <option value="4">Red</option>
        <option value="2">Yellow</option>
        <option value="2">White</option>
        <option value="5">Other</option>
        </select>
        <br />

        Age<input name="" type="number" value="" /> 

        <br />

        <input name="" type="submit" value="Total" />
        <span>Total: </span><span id="result"></span>
    </form>


<script type="text/javascript">
function calcTotal(oForm){
    var sum = 0;
    for(i=0; i < oSels.length; i++){
        sum += new Number(oSels[i].value);
    }
    document.getElementById('result').innerHTML = sum;
    return false;
}
window.onload=function(){
    oSels = document.getElementById('form1').getElementsByTagName('select');
    for(i=0; i < oSels.length; i++){
        oSels[i].onchange=function(){
            document.getElementById('result').innerHTML = '';
        }


    }
}
</script>

Answer 1

I played with your code. I don't now if it's someting like that that you wanted but here is an example of random score.

It now use the age to generate a value.

Take a look if you like it at my codepen .

I changed the age input:

Age<input id="age" name="" type="number" value="" />

I also added a new function to generate random number between min-max:

function getRandomInt (min, max) {
    return Math.floor(Math.random() * (max - min + 1)) + min;
}

And modified how the sum is calculated:

var age = document.getElementById('age').value;
sum = parseInt(age) + parseInt(getRandomInt(sum-(age / 4),sum+(age / 4)));
//Add some random. The more you are older, the more random it is.

You can do a lot of different generated sum. If you want less modifications, we also can take the last digit of the age to get the min/max value generated...

Edit: To help you share variables between pages, Look at this question .

Answer 2

Adding this as an answer as the submitter considers it a good idea:

Put the result from all your maths into hidden fields. Then when you submit the form, the values will be passed along.

You don't need to do anything special really. Just add fields like this:

<input type="hidden" value="[yourValue]" name="fieldName" id="fieldId" />

For the yourValue part, simply insert your caclulated value from the JavaScript:

document.getElementById("fieldId").value = calculatedValue;

Since it's all part of the same form that you're submitting anyway, they will all be past along. You can retrieve the fields on the receiving page as normal.

I downloaded and edited your entire code block. I changed a couple of things. 1. You don't need the onsubmit on your form. You need a call the JavaScript function on a Total button. The submit button is added to submit the form when the user is done. 2. A hidden field to hold your result is added to the form. 3. The function where you do your calculation has an addition to send the calulated total to the new hidden field. 4. You need to add something to the ACTION, so it knows where to submit the form. You can also remove the ALERT. I just added that to be sure it worked right.

I've run and tested this, and it works exactly as expected. This is what the edited code looks like:

 <body>
        <form id="form1" action="" method="post">
        <select name=select1>
            <option selected="selected" value="0">Chinese Zodiac</option>
        <option value="3">Rat</option>
        <option value="3">Ox</option>
        <option value="4">Tiger</option>
        <option value="2">Rabbit</option>
        <option value="4">Dragon</option>
        <option value="5">Snake</option>
        <option value="3">Horse</option>
        <option value="3">Sheep</option>
        <option value="4">Monkey</option>
        <option value="5">Rooster</option>
        <option value="3">Dog</option>
        <option value="3">Pig</option>
        </select>
        </select>
        <br />
        <select name=select2>
            <option selected="selected" value="0">Star Sign</option>
        <option value="2">Aries</option>
        <option value="4">Taurus</option>
        <option value="3">Gemini</option>
        <option value="4">Cancer</option>
        <option value="3">Leo</option>
        <option value="2">Virgo</option>
        <option value="2">Libra</option>
        <option value="3">Scorpio</option>
        <option value="2">Sagittarius</option>
        <option value="4">Capricorn</option>
        <option value="2">Aquarius</option>
        <option value="3">Pisces</option>
        </select>
        <br />

        <select name=select3>
            <option selected="selected" value="0">Blood Type</option>
        <option value="3">O</option>
        <option value="2">A</option>
        <option value="1">B</option>
        <option value="3">AB</option>
        </select>
        <br />

        <select name=select4>
            <option selected="selected" value="0">Favourite Colour</option>
        <option value="3">Black</option>
        <option value="3">Blue</option>
        <option value="2">Brown</option>
        <option value="2">Green</option>
        <option value="3">Orange</option>
        <option value="3">Pink</option>
        <option value="2">Purple</option>
        <option value="4">Red</option>
        <option value="2">Yellow</option>
        <option value="2">White</option>
        <option value="5">Other</option>
        </select>
        <br />

        Age<input name="" type="number" value="" /> 

        <br />

        <input name="" type="button" value="Total" onclick="calcTotal();" />
        <input name="submit" type="submit" value="Submit" />
        <span>Total: </span><span id="result"></span>

        <input type="hidden" value="0" name="resultIs" id="resultIs" />
    </form>


<script type="text/javascript">
    function calcTotal(oForm) {
        var sum = 0;
        for (i = 0; i < oSels.length; i++) {
            sum += new Number(oSels[i].value);
        }
        //This is what you are using to display the result to your user.
        document.getElementById('result').innerHTML = sum;

        //This will add the value of the result to a hidden field I added to the form.  When you submit it, just request the value of "resultIs"
        document.getElementById("resultIs").value = sum;
        alert(sum);
        return false;
    }
    //I really don't even see that this is needed.  Your form doesn't need to be cleared onLoad.
    window.onload = function() {
        oSels = document.getElementById('form1').getElementsByTagName('select');
        for (i = 0; i < oSels.length; i++) {
            oSels[i].onchange = function() {
                document.getElementById('result').innerHTML = '';
            }


        }
    }
</script>

Html/Javascript form calculation and validation in new page

Question

2 answers

solution1
1 2014-04-17 05:16:46

solution2
0 2014-04-16 13:12:18

Html/Javascript form calculation and validation in new page

Question

2 answers

solution1 1 2014-04-17 05:16:46

solution2 0 2014-04-16 13:12:18

solution1
1 2014-04-17 05:16:46

solution2
0 2014-04-16 13:12:18