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    <p>You cannot have multiple elements that share the same ID. An ID has to be unique throughout the whole document.</p> <p>That said, you have to change your code to use classes:</p> <pre><code>&lt;table id="table" border="0"&gt; &lt;thead&gt; &lt;th&gt;Price&lt;/th&gt;&lt;th&gt;Quantity&lt;/th&gt;&lt;th&gt;Total&lt;/th&gt; &lt;/thead&gt; &lt;tbody&gt; &lt;tr&gt; &lt;td&gt;&lt;input class="price" type = "text"&gt;&lt;/input&gt;&lt;/td&gt; &lt;td&gt;&lt;input class="quantity" type = "text"&gt;&lt;/input&gt;&lt;/td&gt; &lt;td&gt;&lt;input class="total" type = "text"&gt;&lt;/input&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/tbody&gt; &lt;/table&gt; &lt;a href="#" id="add"&gt;Add New&lt;/a&gt; &lt;a href="#" id="remove"&gt;Remove&lt;/a&gt; </code></pre> <p>And:</p> <pre><code>$(function(){ $('a#add').click(function(){ $('#table &gt; tbody').append('&lt;tr&gt;&lt;td&gt;&lt;input class ="price" type = "text"&gt;&lt;/input&gt;&lt;/td&gt;&lt;td&gt;&lt;input class ="quantity" type = "text"&gt;&lt;/input&gt;&lt;/td&gt;&lt;td&gt;&lt;input class ="total" type = "text"&gt;&lt;/input&gt;&lt;/td&gt;&lt;/tr&gt;'); }); $('a#remove').click(function(){ $('#table &gt; tbody &gt; tr:last').remove(); }); }); </code></pre> <p>In order to provide a complete solution, where is your link with ID <code>calc</code>. How should the calculation work? Should every row has its own <code>calculation</code> button or do you have one global button the calculates the values for every row?</p> <p>If the latter you can use something like this:</p> <pre><code>$('a#calc').click(function(){ $('#table tr').each(function() { $(this).find('.total').val( parseFloat($(this).find('.quantity').val())* parseFloat($(this).find('.price').val()) ); } } </code></pre> <p><strong>Explanation:</strong></p> <p>When you click the link, the function loops over every row in the table, searches for the to input fields with class <code>quantity</code> and <code>price</code> and puts the result into the input with class <code>total</code> in that row.</p> <p>Note that I use <code>parseFloat</code> to make sure to use numbers for the calculation.</p> <hr> <p>Also note that you don't have to use <code>$(function(){})</code> around every single piece of JS code you create. Put <strong>everything</strong> that needs to be executed <strong>after the DOM</strong> loaded (because you access elements from your code) into this function. So you should do:</p> <pre><code>$(function() { $('a#add').click(function(){ // ..... }: $('a#calc').click(function(){ // ... }; } </code></pre> <hr> <p><strong>Update:</strong> If you want to use the <code>.blur()</code> method, here is an example:</p> <pre><code>$('#table').delegate('input.total' , 'blur', function(){ var row = $(this).closest('tr'); $(this).val( $('.quantity', row).val())* $('.price', row).val()) ); }); </code></pre> <p><a href="http://api.jquery.com/closest/" rel="nofollow noreferrer"><code>.closest()</code></a> gets the closest parent that matches the selector (in this case the row) and the rest is similar to the first function I wrote (getting the values of the particular row.</p> <p>I use the newer method <a href="http://api.jquery.com/delegate/" rel="nofollow noreferrer"><code>delegate()</code></a> here, but you can also use <a href="http://api.jquery.com/live/" rel="nofollow noreferrer"><code>.live()</code></a>. Note that you have to use one of them because your are creating the row dynamically and at the time e.g. <code>$(input.total).blur(function(){})</code> would be run (when the DOM is loaded) no row is created yet.</p>
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    1. POjquery performing calculation on dynamically generated elements
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    1. COSorry I meant to remove that a#calc from my code and maybe use jquery's blur and focus events so that the .total box would automatically be calculated. You're helping me better understand this though. Thanks.
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    2. COI tried using your code, but the your iterator function doesn't seem to work (I click on the calc link and nothing happens)
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    3. CO@user306472: Mmh I should work, I will have a look again... note the update on my answer about using e.g. `blur`.
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