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    <h2>Working solution - <a href="http://codepen.io/jmarroyave/pen/eLkst" rel="nofollow noreferrer">http://codepen.io/jmarroyave/pen/eLkst</a></h2> <p>This is basically the same solution that i presented before, i just changed how to get the column index to remove the restriction of the jquery.position, and did some refactor to the code.</p> <pre><code>function layoutInitialize(tableId){ var layout = String(); var maxCols, maxRows, pos, i, rowspan, idx, xy; maxCols = $(tableId + ' tr').first().children().length; maxRows = $(tableId + ' tr').length; // Initialize the layout matrix for(i = 0; i &lt; (maxCols * maxRows); i++){ layout += '?'; } // Initialize cell data $(tableId + ' td').each(function() { $(this).addClass($(this).parent().attr('color_class')); rowspan = 1; if($(this).attr('rowspan')){ rowspan = $(this).attr("rowspan"); $(this).data("rowspan", rowspan); } // Look for the next position available idx = layout.indexOf('?'); pos = {x:idx % maxCols, y:Math.floor(idx / maxCols)}; // store the column index in the cell for future reposition $(this).data('column', pos.x); for(i = 0; i &lt; rowspan; i++){ // Mark this position as not available xy = (maxCols * pos.y) + pos.x layout = layout.substr(0, xy + (i * maxCols)) + 'X' + layout.substr(xy + (i * maxCols) + 1); } }); } </code></pre> <hr> <h2>Solution: with jquery.position() - <a href="http://codepen.io/jmarroyave/pen/rftdy" rel="nofollow noreferrer">http://codepen.io/jmarroyave/pen/rftdy</a></h2> <p>This is an alternative solution, it assumes that the first row contains all the information about the number of the table columns and the position of each on. </p> <p>This aproach <em>has the restriction that the inizialitation code must be call when the table is visible</em>, because it depends on the visible position of the columns.</p> <p>If this is not an issue, hope it works for you</p> <p><strong>Initialization</strong></p> <pre><code> // Initialize cell data $('td').each(function() { $(this).addClass($(this).parent().attr('color_class')); $(this).data('posx', $(this).position().left); if($(this).attr('rowspan')){ $(this).data("rowspan", $(this).attr("rowspan")); } }); </code></pre> <p><strong>UPDATE</strong> According to this <a href="https://stackoverflow.com/questions/5974323/jquery-get-the-offset-of-hidden-element">post</a> ensuring the visibility of the table can be manage with </p> <pre><code> $('table').show(); // Initialize cell data $('td').each(function() { $(this).addClass($(this).parent().attr('color_class')); $(this).data('posx', $(this).position().left); if($(this).attr('rowspan')){ $(this).data("rowspan", $(this).attr("rowspan")); } }); $('table').hide(); </code></pre> <p>As Ian said, the main issue to solve in this problem is to calculate the position of the cells when merging the hidden with the visible rows.</p> <p>I tried to figure it out how the browser implements that funcionality and how to work with that. Then looking the DOM i searched for something like columnVisiblePosition and i found the position attributes and took that way</p> <pre><code> function getColumnVisiblePostion($firstRow, $cell){ var tdsFirstRow = $firstRow.children(); for(var i = 0; i &lt; tdsFirstRow.length; i++){ if($(tdsFirstRow[i]).data('posx') == $cell.data('posx')){ return i; } } } </code></pre> <p>The js code</p> <pre><code>$(document).ready(function () { add_delete_buttons(); $(window).on("tr_gone", function (e, tr) { add_come_back_button(tr); }); // Initialize cell data $('td').each(function() { $(this).addClass($(this).parent().attr('color_class')); $(this).data('posx', $(this).position().left); if($(this).attr('rowspan')){ $(this).data("rowspan", $(this).attr("rowspan")); } }); }); function calculate_max_rowspans() { // Remove all temporary cells $(".tmp").remove(); // Get all rows var trs = $('tr'), tds, tdsTarget, $tr, $trTarget, $td, $trFirst, cellPos, cellTargetPos, i; // Get the first row, this is the layout reference $trFirst = $('tr').first(); // Iterate through all rows for(var rowIdx = 0; rowIdx &lt; trs.length; rowIdx++){ $tr = $(trs[rowIdx]); $trTarget = $(trs[rowIdx+1]); tds = $tr.children(); // For each cell in row for(cellIdx = 0; cellIdx &lt; tds.length; cellIdx++){ $td = $(tds[cellIdx]); // Find which one has a rowspan if($td.data('rowspan')){ var rowspan = Number($td.data('rowspan')); // Evaluate how the rowspan should be display in the current state // verify if the cell with rowspan has some hidden rows for(i = rowIdx; i &lt; (rowIdx + Number($td.data('rowspan'))); i++){ if(!$(trs[i]).is(':visible')){ rowspan--; } } $td.attr('rowspan', rowspan); // if the cell doesn't have rows hidden within, evaluate the next cell if(rowspan == $td.data('rowspan')) continue; // If this row is hidden copy the values to the next row if(!$tr.is(':visible') &amp;&amp; rowspan &gt; 0) { $clone = $td.clone(); // right now, the script doesn't care about copying data, // but here is the place to implement it $clone.data('rowspan', $td.data('rowspan') - 1); $clone.data('posx', $td.data('posx')); $clone.attr('rowspan', rowspan); $clone.addClass('tmp'); // Insert the temp node in the correct position // Get the current cell position cellPos = getColumnVisiblePostion($trFirst, $td); // if is the last just append it if(cellPos == $trFirst.children().length - 1){ $trTarget.append($clone); } // Otherwise, insert it before its closer sibling else { tdsTarget = $trTarget.children(); for(i = 0; i &lt; tdsTarget.length; i++){ cellTargetPos = getColumnVisiblePostion($trFirst, $(tdsTarget[i])); if(cellPos &lt; cellTargetPos){ $(tdsTarget[i]).before($clone); break; } } } } } } // remove tmp nodes from the previous row if(rowIdx &gt; 0){ $tr = $(trs[rowIdx-1]); if(!$tr.is(':visible')){ $tr.children(".tmp").remove(); } } } } // this function calculates the position of a column // based on the visible position function getColumnVisiblePostion($firstRow, $cell){ var tdsFirstRow = $firstRow.children(); for(var i = 0; i &lt; tdsFirstRow.length; i++){ if($(tdsFirstRow[i]).data('posx') == $cell.data('posx')){ return i; } } } function add_delete_buttons() { var $all_rows = $("tr"); $all_rows.each(function () { // TR to remove var $tr = $(this); var delete_btn = $("&lt;button&gt;").text("x"); delete_btn.on("click", function () { $tr.hide(); calculate_max_rowspans(); $(window).trigger("tr_gone", $tr); }); var delete_cell = $("&lt;td&gt;"); delete_cell.append(delete_btn); $(this).append(delete_cell); }); } function add_come_back_button(tr) { var $tr = $(tr); var come_back_btn = $("&lt;button&gt;").text("come back " + $tr.attr("color_class")); come_back_btn.css({"background": $(tr).css("background")}); come_back_btn.on("click", function () { $tr.show(); come_back_btn.remove(); calculate_max_rowspans(); }); $("table").before(come_back_btn); } </code></pre> <p>if you have any questions or comments let me know.</p>
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    1. POHandle cells with rowspan when hiding table rows
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    1. COYour Answer looks detailed, Please specify the problem that was found if possible so that others may learn from it. Thanks.
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    2. COI added more comments and changed variables names, i hope it makes it more clear
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    3. CONo it doesn't work for the reasons stated in my answer. Nice ideas though :)
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