Hello,

I am using a javascript that updates the total amount of checkboxes\radio buttons. I can't figure out how to make it so that one checkbox\radio box is automaticly selected and added to the total?
external JS:
Code:
/* This script and many more are available free online at
The JavaScript Source :: http://javascript.internet.com
Created by: Kevin Hartig :: http://www.grafikfx.net/ */

// Calculate the total for items in the form which are selected.
function calculateTotal(inputItem) {
  with (inputItem.form) {
    // Process each of the different input types in the form.
    if (inputItem.type == "radio") {   // Process radio buttons.
      // Subtract the previously selected radio button value from the total.
      calculatedTotal.value = eval(calculatedTotal.value) - eval(previouslySelectedRadioButton.value);
      // Save the current radio selection value.
      previouslySelectedRadioButton.value = eval(inputItem.value);
      // Add the current radio button selection value to the total.
      calculatedTotal.value = eval(calculatedTotal.value) + eval(inputItem.value);
    } else {   // Process check boxes.
      if (inputItem.checked == false) {   // Item was uncheck. Subtract item value from total.
          calculatedTotal.value = eval(calculatedTotal.value) - eval(inputItem.value);
      } else {   // Item was checked. Add the item value to the total.
          calculatedTotal.value = eval(calculatedTotal.value) + eval(inputItem.value);
      }
    }

    // Total value should never be less than 0.
    if (calculatedTotal.value < 0) {
      InitForm();
    }

    // Return total value.
    return(formatCurrency(calculatedTotal.value));
  }
}

// Format a value as currency.
function formatCurrency(num) {
  num = num.toString().replace(/\$|\,/g,'');
  if(isNaN(num))
     num = "0";
  sign = (num == (num = Math.abs(num)));
  num = Math.floor(num*100+0.50000000001);
  cents = num%100;
  num = Math.floor(num/100).toString();
  if(cents<10)
      cents = "0" + cents;
  for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
      num = num.substring(0,num.length-(4*i+3)) + ',' + num.substring(num.length-(4*i+3));
  return (((sign)?'':'-') + '$' + num + '.' + cents);
}

// This function initialzes all the form elements to default values.
function InitForm() {
  // Reset values on form.
  document.selectionForm.total.value='$0';
  document.selectionForm.calculatedTotal.value=0;
  document.selectionForm.previouslySelectedRadioButton.value=0;

  // Set all checkboxes and radio buttons on form to unchecked.
  for (i=0; i < document.selectionForm.elements.length; i++) {
    if (document.selectionForm.elements[i].type == 'checkbox' | document.selectionForm.elements[i].type == 'radio') {
      document.selectionForm.elements[i].checked = false;
    }
  }
}
HTML:
Code:
<html>
<head>
<script type="text/javascript" src="yourFileName.js"></script>
</head>
<body onload="InitForm();" onreset="InitForm();">
<div align="center">
<table><tr><td>
  <form method="POST" name="selectionForm">
    <b>Pizza Order</b><br>
    Small $10.00
    <input type="checkbox" name="Steak"   value="10.00"  onclick="this.form.total.value=calculateTotal(this);">  
    Medium $12.00
    <input type="checkbox" name="Chicken" value="12.00" onclick="this.form.total.value=calculateTotal(this);">  
    Large $15.00
    <input type="checkbox" name="Sushi"   value="15.00"  onclick="this.form.total.value=calculateTotal(this);">
    <br><br>
    <b>Extra Toppings (only one selection allowed):</b> <br>
      <input type="radio" name="Sauce" value="0.00" onclick="this.form.total.value=calculateTotal(this);"> None
    <br>
      <input name="Sauce" type="radio"  value="1.00" onclick="this.form.total.value=calculateTotal(this);"> Extra Cheese $1.00
    <br>
      <input type="radio" name="Sauce" value="2.00" onclick="this.form.total.value=calculateTotal(this);"> Vegetarian $2.00
    <br>
      <input type="radio" name="Sauce" value="3.00" onclick="this.form.total.value=calculateTotal(this);"> Meat $3.00
    <br>
    <br>
    <input type="hidden" name="calculatedTotal" value="0">
    <input type="hidden" name="previouslySelectedRadioButton" value="0">
    <strong>Your total is:</strong>
    <input type="text" name="total" readonly onfocus="this.blur();">
  </form>
</td></tr></table>
</div>
</body>
</html>
So is there anyway to automaticly add one radio button and one checkbox?
THANKS,