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fileserverdirect
01-26-2008, 04:59 PM
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:


/* 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:


<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,