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    copied!<p>HTML:</p> <pre><code>&lt;div id="box"&gt; &lt;p&gt; Valor: &lt;input id="valor"&gt; &lt;/p&gt; &lt;p&gt; Taxa: &lt;input id="taxa"&gt; &lt;/p&gt; &lt;p&gt; Imposto: &lt;input id="imposto"&gt; &lt;/p&gt; &lt;p&gt; Envio: &lt;input id="envio"&gt; &lt;/p&gt; &lt;p&gt; Taxa adicional: &lt;input id="taxa_adicional"&gt; &lt;/p&gt; &lt;p&gt; Subtotal: &lt;span id="subtotal"&gt;0&lt;/span&gt; &lt;/p&gt; &lt;p&gt; Total: &lt;span id="total"&gt;0&lt;/span&gt; &lt;/p&gt; &lt;/div&gt; </code></pre> <p>JavaScript:</p> <pre><code>var options = { format: '#,###.00', locale: 'br' }, inputs = $( 'input:text', '#box' ).get(), input_adicional = $( '#taxa_adicional' )[0], input_total = $( '#total' )[0], input_subtotal = $( '#subtotal' )[0]; </code></pre> <p>and then:</p> <pre><code>$( inputs ).add( [ input_total, input_subtotal ] ).format( options ); $( inputs ). blur( function () { var total = 0, subtotal = 0; // on blur, format the field $( this ).format( options ); // calculate the sum of all input fields $( inputs ).each( function () { total += +$( this ).parse( options ); }); // subtotal doesn't include the "additional" field subtotal = total - $( input_adicional ).parse( options ); // populate the SPAN's with the sums and format the nubmers $( input_subtotal ).text( subtotal ).format( options ); $( input_total ).text( total ).format( options ); }). focus( function () { // if the field contains the value 0, empty it if ( +$( this ).parse( options ) === 0 ) { this.value = ''; } }); </code></pre> <p><strong>Live demo:</strong> <a href="http://jsfiddle.net/U9V6x/" rel="nofollow">http://jsfiddle.net/U9V6x/</a></p>
 

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