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2013-02-10T00:39:47.093
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2013-02-10T00:39:47.093
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<p>The easiest way I can see to do this is:</p> <ul> <li>Set your base price as a variable in JavaScript</li> <li>Call a function when a checkbox is checked or unchecked</li> <li>Add or subtract the value of the check box from the base price</li> </ul> <p>I added two things to your example code. First, for each checkbox I added an onchange function we'll call update(). Second, I gave "Total" an id of total.</p> <p>HTML:</p> <pre><code>Piecemaker - <input name="piecemaker" type="checkbox" value="20" onchange="update(this);"> <br> Network Bar - <input name="netbar" type="checkbox" value="15" onchange="update(this);"> <br> 10 Tags - <input name="tags" type="checkbox" value="5" onchange="update(this);"> <br> Shopping System - <input name="shop" type="checkbox" value="20" onchange="update(this);"> <br> <br> Total: <input id='total' name="total" type="text" value="$150" readonly> </code></pre> <p>The JavaScript is pretty straight forward. Set a base price (running_total), and either add or subtract the value of the checkbox from running_total.</p> <p>JavaScript:</p> <pre><code>var running_total = 150; function update(feature) { // Check if(feature.checked == true){ // Add value to running_total running_total += parseInt(feature.value); document.getElementById('total').value = '$' + running_total; } // Uncheck if(feature.checked == false){ // Subtract value from running_total running_total -= parseInt(feature.value); document.getElementById('total').value = '$' + running_total; } } </code></pre> <p>Here's a link to a working example on jsfiddle.net: <a href="http://jsfiddle.net/dnA7q/1/" rel="nofollow">http://jsfiddle.net/dnA7q/1/</a></p>
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1. POChanging HTML Value depending on checkboxes
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1. COPerfect. Just what I was looking for. Thank you very much!
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