JQuery :: Auto-Calculation Based On Radio Buttons

Apr 12, 2011

I am stuck on the last part of this jQuery auto-calculation script that I am working on. I want to automatically re-calculate the subtotal values based on a "radio button click". The calculation will automatically add a 10% discount when the radio button "special_(n)" "yes" value gets clicked, but revert back to normal price when the "no" value gets clicked.

View the script in action here: [url] (tip): enter a value into the 'qty' field, and the totals will auto calculate.

HTML:

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Finding End Result With Checkboxes / Radio Buttons In One Calculation

Feb 27, 2009

Having trouble calculating the final cost of choices made by a user. I have 4 radio buttons and 2 checkboxes. The first three radio buttons are, all intensive purposes, chocolates with the last radio button stating that the user doesn't want any of the chocolates. The two checkboxes are a milkshake and candyfloss respectively. The user may only choose one of the three chocolates and optionally the milkshake, candyfloss or both.

What I have so far is as follows:
Javascript code
function calc(sec,val,item)
{
if(!item) {
var item = null;
}
switch(sec)
{

case 1:
Some code for a different function.
break

case 2:
cValue = parseInt(document.getElementById("purchaseTotal").value);
if(item.checked){
document.getElementById("purchaseTotal").value = cValue+val;
}else{
document.getElementById("purchaseTotal").value = cValue-val;
} break;
} }
html
<td>Chocolate 1: ZAR 5.00</td>
<td><input name="chocolate" type="radio" id="chocolate" value="" onClick="calc(2,5.00, this);">
</td>
<td> </td>
</tr>
<tr>
<td>Chocolate 2: ZAR 5.00</td>
<td><input name="chocolate" type="radio" id="chocolate" value="" onClick="calc(2,5.00, this);">
</td>
<td> </td>
</tr>
<tr>
<td>Chocolate 3: ZAR 1 200.00</td>
<td><input name="chocolate" type="radio" id="chocolate" value="" onClick="calc(2,5.00, this);">
</td>
<td> </td>
</tr>
<tr>
<td>I do not wish to buy a chocolate.</td>
<td><input name="chocolate" type="radio" id="chocolate" value="" onClick="calc(2,0, this);">
</td>
<td> </td>
</tr>
<tr>
<td>Milkshake: ZAR 13.00</td>
<td><input type="checkbox" name="milkshake" id="milkshake" value="" onClick="calc(2,13.00, this);"></td>
<td> </td>
</tr>
<tr>
<td>Candyfloss: ZAR 8.00</td>
<td><input type="checkbox" name="candyfloss" id="candyfloss" value="" onClick="calc(2,8.00, this);"></td>
<td> </td>
</tr>
<tr>
<td colspan="3" align="right" valign="top">Total ZAR <input name="purchaseTotal" type="text" id="purchaseTotal" value="0"></td>

What happens at the moment is that clicking on one radio button doesn't subtract the amount from the previous selected radio button and clicking on the same radio button just keeps adding its value to the total. I'd like it to do the opposite and not add to the total if clicked repeatedly and if another radio button is selected the amount of the previous radio button must be deducted from the total.

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If the first radio button is selected, I only want all three buttons to be
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If the second radio button is selected, I only want the "Edit Data" and "View
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If the third radio button is selected, I only want the "View Data" button to be
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Is it possible to accomplish this in Javascript? In particular, I want to
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