php - how to pass different values on selecting different radio button in text box

Question

I'm working on different radio button how can I pass the different values on selecting radio button, like if user select domestic then the value that pass to all text box will be 2 n if user select a in radio button then value pass to be 3 and so on for different radio button selection.This value passing mean if user enter any value in text box name text1 that value which user enter and the value of the radio button that user select multiply and then display in text box below. if user select different radio button then that raddio button value and the value enter in text box got multiply.

My code:

    <style>
div {
    margin: 10px 0;
}
div label {
    width: 140px;
    display: inline-block;
    text-align: right;
}
input[readonly] {
    background: #eee;
}
</style>
<script type="text/javascript" src="jquery.min2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
    $('#loads').closest('div').hide();

    $('input[name="myradio"]').change(function(){
        if($('input[name="myradio"]:checked').val() == '100')
            $('#loads').closest('div').hide();
        else
            $('#loads').closest('div').show();
    });

    $('#btn-calculate').click(function(){
        var units = parseInt( $('#units').val() );
        var radioVal = $('input[name="myradio"]:checked').val();
        $('input[readonly]').each(function(){
            var val = units * radioVal * ($(this).data('value') ? $(this).data('value') : 100);
            $(this).val(val);
        });
    });
});

</script>



  <form method="POST" name="form1">
<label>Select your category:</label>
    <label class="radio">
        <input type="radio" value="100" name="myradio" checked="checked" />Domestic</label>
    <label class="radio">
        <input type="radio" value="200" name="myradio" />a</label>
    <label class="radio">
        <input type="radio" value="300" name="myradio" />b</label>
    <label class="radio">
        <input type="radio" value="400" name="myradio" />c</label>
    <div>
        <label for="units">No of units(kwh) used</label>
        <input type="text" name="units" id="units" />
    </div>
    <div>
        <label for="loads">Connected loads(kwh)</label>
        <input type="text" name="loads" id="loads" />
    </div>
    <div>
        <label for="actual">Actual</label>
        <input type="text" data-value="2.60" readonly="readonly" name="actual" id="actual" />
    </div>
    <div>
        <label for="tax">Tax</label>
        <input type="text" readonly="readonly" name="tax" id="tax" />
    </div>
    <div>
        <label for="elec">Elec</label>
        <input type="text" readonly="readonly" name="elec" id="elec" />
    </div>
    <div>
        <label for="charges">Charges</label>
        <input type="text" readonly="readonly" name="charges" id="charges" />
    </div>
    <div>
        <label for="amount">Amount</label>
        <input type="text" readonly="readonly" name="amount" id="amount" />
    </div>
    <div>
        <label for="govt">Govt</label>
        <input type="text" readonly="readonly" name="govt" id="govt" />
    </div>
    <div>
        <label for="result">Result</label>
        <input type="text" readonly="readonly" name="result" id="result" />
    </div>
    <button type="button" id="btn-calculate">Calculate</button>
</form>

one problem is that i display one text box name mytext display on if user select a ,b ,c from the radio button and hide on selecting domestic radio button but whenever i refresh my page its always selected on a and the text box appear how can i remove this . i created the js -fiddle here is the link http://jsfiddle.net/MUGzE/ kindly answer my both question i will really appreciate.

Answer 1

I just want to share this with you. I made a cleaner version of your markup and used jQuery to make JS calls more compact, also I used data-attributes to set the value that needs to be multiplied for each input.

Here's the Javascript:

$(document).ready(function(){
    $('#loads').closest('div').hide();

    $('input[name="myradio"]').change(function(){
        if($('input[name="myradio"]:checked').val() == '100')
            $('#loads').closest('div').hide();
        else
            $('#loads').closest('div').show();
    });

    $('#btn-calculate').click(function(){
        var units = parseInt( $('#units').val() );
        var radioVal = $('input[name="myradio"]:checked').val();
        $('input[readonly]').each(function(){
            var val = units * radioVal * ($(this).data('value') ? $(this).data('value') : 100);
            $(this).val(val);
        });
    });
});

Full demo here