1

I have seen many ways to make the header fixed on a standard table, but usually this involves cloning the table (to match the variable widths). This of course would not work for me as the header is clickable, allowing people to sort the contents of certain rows.

So, is there a way to essentially 'freeze' the header row while still retaining the functionality of the sort?

Here is the basic table code (all css kept in 'stylesheet' for cleanliness & likewise with js)

var stIsIE = /*@cc_on!@*/false;

sorttable = {
 init: function() {
    // quit if this function has already been called
    if (arguments.callee.done) return;
    // flag this function so we don't do the same thing twice
    arguments.callee.done = true;
    // kill the timer
    if (_timer) clearInterval(_timer);

    if (!document.createElement || !document.getElementsByTagName) return;

    sorttable.DATE_RE = /^(\d\d?)[\/\.-](\d\d?)[\/\.-]((\d\d)?\d\d)$/;

    forEach(document.getElementsByTagName('table'), function(table) {
      if (table.className.search(/\bsortable\b/) != -1) {
        sorttable.makeSortable(table);
      }
    });

  },

  makeSortable: function(table) {
    if (table.getElementsByTagName('thead').length == 0) {
      // table doesn't have a tHead. Since it should have, create one and
      // put the first table row in it.
      the = document.createElement('thead');
      the.appendChild(table.rows[0]);
      table.insertBefore(the,table.firstChild);
    }
    // Safari doesn't support table.tHead, sigh
    if (table.tHead == null) table.tHead = table.getElementsByTagName('thead')[0];

    if (table.tHead.rows.length != 1) return; // can't cope with two header rows

    // Sorttable v1 put rows with a class of "sortbottom" at the bottom (as
    // "total" rows, for example). This is B&R, since what you're supposed
    // to do is put them in a tfoot. So, if there are sortbottom rows,
    // for backwards compatibility, move them to tfoot (creating it if needed).
    sortbottomrows = [];
    for (var i=0; i<table.rows.length; i++) {
      if (table.rows[i].className.search(/\bsortbottom\b/) != -1) {
        sortbottomrows[sortbottomrows.length] = table.rows[i];
      }
    }
    if (sortbottomrows) {
      if (table.tFoot == null) {
        // table doesn't have a tfoot. Create one.
        tfo = document.createElement('tfoot');
        table.appendChild(tfo);
      }
      for (var i=0; i<sortbottomrows.length; i++) {
        tfo.appendChild(sortbottomrows[i]);
      }
      delete sortbottomrows;
    }

    // work through each column and calculate its type
    headrow = table.tHead.rows[0].cells;
    for (var i=0; i<headrow.length; i++) {
      // manually override the type with a sorttable_type attribute
      if (!headrow[i].className.match(/\bsorttable_nosort\b/)) { // skip this col
        mtch = headrow[i].className.match(/\bsorttable_([a-z0-9]+)\b/);
        if (mtch) { override = mtch[1]; }
       if (mtch && typeof sorttable["sort_"+override] == 'function') {
         headrow[i].sorttable_sortfunction = sorttable["sort_"+override];
       } else {
         headrow[i].sorttable_sortfunction = sorttable.guessType(table,i);
       }
       // make it clickable to sort
       headrow[i].sorttable_columnindex = i;
       headrow[i].sorttable_tbody = table.tBodies[0];
       dean_addEvent(headrow[i],"click", sorttable.innerSortFunction = function(e) {

          if (this.className.search(/\bsorttable_sorted\b/) != -1) {
            // if we're already sorted by this column, just
            // reverse the table, which is quicker
            sorttable.reverse(this.sorttable_tbody);
            this.className = this.className.replace('sorttable_sorted',
                                                    'sorttable_sorted_reverse');
            this.removeChild(document.getElementById('sorttable_sortfwdind'));
            sortrevind = document.createElement('span');
            sortrevind.id = "sorttable_sortrevind";
            sortrevind.innerHTML = stIsIE ? '&nbsp<font face="webdings">5</font>' : '&nbsp;&#x25B4;';
            this.appendChild(sortrevind);
            return;
          }
          if (this.className.search(/\bsorttable_sorted_reverse\b/) != -1) {
            // if we're already sorted by this column in reverse, just
            // re-reverse the table, which is quicker
            sorttable.reverse(this.sorttable_tbody);
            this.className = this.className.replace('sorttable_sorted_reverse',
                                                    'sorttable_sorted');
            this.removeChild(document.getElementById('sorttable_sortrevind'));
            sortfwdind = document.createElement('span');
            sortfwdind.id = "sorttable_sortfwdind";
            sortfwdind.innerHTML = stIsIE ? '&nbsp<font face="webdings">6</font>' : '&nbsp;&#x25BE;';
            this.appendChild(sortfwdind);
            return;
          }

          // remove sorttable_sorted classes
          theadrow = this.parentNode;
          forEach(theadrow.childNodes, function(cell) {
            if (cell.nodeType == 1) { // an element
              cell.className = cell.className.replace('sorttable_sorted_reverse','');
              cell.className = cell.className.replace('sorttable_sorted','');
            }
          });
          sortfwdind = document.getElementById('sorttable_sortfwdind');
          if (sortfwdind) { sortfwdind.parentNode.removeChild(sortfwdind); }
          sortrevind = document.getElementById('sorttable_sortrevind');
          if (sortrevind) { sortrevind.parentNode.removeChild(sortrevind); }

          this.className += ' sorttable_sorted';
          sortfwdind = document.createElement('span');
          sortfwdind.id = "sorttable_sortfwdind";
          sortfwdind.innerHTML = stIsIE ? '&nbsp<font face="webdings">6</font>' : '&nbsp;&#x25BE;';
          this.appendChild(sortfwdind);

         // build an array to sort. This is a Schwartzian transform thing,
         // i.e., we "decorate" each row with the actual sort key,
         // sort based on the sort keys, and then put the rows back in order
         // which is a lot faster because you only do getInnerText once per row
         row_array = [];
         col = this.sorttable_columnindex;
         rows = this.sorttable_tbody.rows;
         for (var j=0; j<rows.length; j++) {
           row_array[row_array.length] = [sorttable.getInnerText(rows[j].cells[col]), rows[j]];
         }
         /* If you want a stable sort, uncomment the following line */
         //sorttable.shaker_sort(row_array, this.sorttable_sortfunction);
         /* and comment out this one */
         row_array.sort(this.sorttable_sortfunction);

         tb = this.sorttable_tbody;
         for (var j=0; j<row_array.length; j++) {
           tb.appendChild(row_array[j][1]);
         }

         delete row_array;
       });
     }
    }
  },

  guessType: function(table, column) {
    // guess the type of a column based on its first non-blank row
    sortfn = sorttable.sort_alpha;
    for (var i=0; i<table.tBodies[0].rows.length; i++) {
      text = sorttable.getInnerText(table.tBodies[0].rows[i].cells[column]);
      if (text != '') {
        if (text.match(/^-?[£$¤]?[\d,.]+%?$/)) {
          return sorttable.sort_numeric;
        }
        // check for a date: dd/mm/yyyy or dd/mm/yy
        // can have / or . or - as separator
        // can be mm/dd as well
        possdate = text.match(sorttable.DATE_RE)
        if (possdate) {
          // looks like a date
          first = parseInt(possdate[1]);
          second = parseInt(possdate[2]);
          if (first > 12) {
            // definitely dd/mm
            return sorttable.sort_ddmm;
          } else if (second > 12) {
            return sorttable.sort_mmdd;
          } else {
            // looks like a date, but we can't tell which, so assume
            // that it's dd/mm (English imperialism!) and keep looking
            sortfn = sorttable.sort_ddmm;
          }
        }
      }
    }
    return sortfn;
  },

  getInnerText: function(node) {
    // gets the text we want to use for sorting for a cell.
    // strips leading and trailing whitespace.
    // this is *not* a generic getInnerText function; it's special to sorttable.
    // for example, you can override the cell text with a customkey attribute.
    // it also gets .value for <input> fields.

    if (!node) return "";

    hasInputs = (typeof node.getElementsByTagName == 'function') &&
                 node.getElementsByTagName('input').length;

    if (node.getAttribute("sorttable_customkey") != null) {
      return node.getAttribute("sorttable_customkey");
    }
    else if (typeof node.textContent != 'undefined' && !hasInputs) {
      return node.textContent.replace(/^\s+|\s+$/g, '');
    }
    else if (typeof node.innerText != 'undefined' && !hasInputs) {
      return node.innerText.replace(/^\s+|\s+$/g, '');
    }
    else if (typeof node.text != 'undefined' && !hasInputs) {
      return node.text.replace(/^\s+|\s+$/g, '');
    }
    else {
      switch (node.nodeType) {
        case 3:
          if (node.nodeName.toLowerCase() == 'input') {
            return node.value.replace(/^\s+|\s+$/g, '');
          }
        case 4:
          return node.nodeValue.replace(/^\s+|\s+$/g, '');
          break;
        case 1:
        case 11:
          var innerText = '';
          for (var i = 0; i < node.childNodes.length; i++) {
            innerText += sorttable.getInnerText(node.childNodes[i]);
          }
          return innerText.replace(/^\s+|\s+$/g, '');
          break;
        default:
          return '';
      }
    }
  },

  reverse: function(tbody) {
    // reverse the rows in a tbody
    newrows = [];
    for (var i=0; i<tbody.rows.length; i++) {
      newrows[newrows.length] = tbody.rows[i];
    }
    for (var i=newrows.length-1; i>=0; i--) {
       tbody.appendChild(newrows[i]);
    }
    delete newrows;
  },

  /* sort functions
     each sort function takes two parameters, a and b
     you are comparing a[0] and b[0] */
  sort_numeric: function(a,b) {
    aa = parseFloat(a[0].replace(/[^0-9.-]/g,''));
    if (isNaN(aa)) aa = 0;
    bb = parseFloat(b[0].replace(/[^0-9.-]/g,''));
    if (isNaN(bb)) bb = 0;
    return aa-bb;
  },
 sort_alpha: function(a,b) {
    if (a[0].toLowerCase()==b[0].toLowerCase()) return 0;
    if (a[0].toLowerCase()<b[0].toLowerCase()) return -1;
    return 1;
  },
  sort_ddmm: function(a,b) {
    mtch = a[0].match(sorttable.DATE_RE);
    y = mtch[3]; m = mtch[2]; d = mtch[1];
    if (m.length == 1) m = '0'+m;
    if (d.length == 1) d = '0'+d;
    dt1 = y+m+d;
    mtch = b[0].match(sorttable.DATE_RE);
    y = mtch[3]; m = mtch[2]; d = mtch[1];
    if (m.length == 1) m = '0'+m;
    if (d.length == 1) d = '0'+d;
    dt2 = y+m+d;
    if (dt1==dt2) return 0;
    if (dt1<dt2) return -1;
    return 1;
  },
  sort_mmdd: function(a,b) {
    mtch = a[0].match(sorttable.DATE_RE);
    y = mtch[3]; d = mtch[2]; m = mtch[1];
    if (m.length == 1) m = '0'+m;
    if (d.length == 1) d = '0'+d;
    dt1 = y+m+d;
    mtch = b[0].match(sorttable.DATE_RE);
    y = mtch[3]; d = mtch[2]; m = mtch[1];
    if (m.length == 1) m = '0'+m;
    if (d.length == 1) d = '0'+d;
    dt2 = y+m+d;
    if (dt1==dt2) return 0;
    if (dt1<dt2) return -1;
    return 1;
  },

  shaker_sort: function(list, comp_func) {
    // A stable sort function to allow multi-level sorting of data
    // see: http://en.wikipedia.org/wiki/Cocktail_sort
    // thanks to Joseph Nahmias
    var b = 0;
    var t = list.length - 1;
    var swap = true;

    while(swap) {
        swap = false;
        for(var i = b; i < t; ++i) {
            if ( comp_func(list[i], list[i+1]) > 0 ) {
                var q = list[i]; list[i] = list[i+1]; list[i+1] = q;
                swap = true;
            }
        } // for
        t--;

        if (!swap) break;

        for(var i = t; i > b; --i) {
            if ( comp_func(list[i], list[i-1]) < 0 ) {
                var q = list[i]; list[i] = list[i-1]; list[i-1] = q;
                swap = true;
            }
        } // for
        b++;

    } // while(swap)
  }
}

/* ******************************************************************
   Supporting functions: bundled here to avoid depending on a library
   ****************************************************************** */

// Dean Edwards/Matthias Miller/John Resig

/* for Mozilla/Opera9 */
if (document.addEventListener) {
    document.addEventListener("DOMContentLoaded", sorttable.init, false);
}

/* for Internet Explorer */
/*@cc_on @*/
/*@if (@_win32)
    document.write("<script id=__ie_onload defer src=javascript:void(0)><\/script>");
    var script = document.getElementById("__ie_onload");
    script.onreadystatechange = function() {
        if (this.readyState == "complete") {
            sorttable.init(); // call the onload handler
        }
    };
/*@end @*/

/* for Safari */
if (/WebKit/i.test(navigator.userAgent)) { // sniff
    var _timer = setInterval(function() {
        if (/loaded|complete/.test(document.readyState)) {
            sorttable.init(); // call the onload handler
        }
    }, 10);
}

/* for other browsers */
window.onload = sorttable.init;

// written by Dean Edwards, 2005
// with input from Tino Zijdel, Matthias Miller, Diego Perini

// http://dean.edwards.name/weblog/2005/10/add-event/

function dean_addEvent(element, type, handler) {
 if (element.addEventListener) {
  element.addEventListener(type, handler, false);
 } else {
  // assign each event handler a unique ID
  if (!handler.$$guid) handler.$$guid = dean_addEvent.guid++;
  // create a hash table of event types for the element
  if (!element.events) element.events = {};
  // create a hash table of event handlers for each element/event pair
  var handlers = element.events[type];
  if (!handlers) {
   handlers = element.events[type] = {};
   // store the existing event handler (if there is one)
   if (element["on" + type]) {
    handlers[0] = element["on" + type];
   }
  }
  // store the event handler in the hash table
  handlers[handler.$$guid] = handler;
  // assign a global event handler to do all the work
  element["on" + type] = handleEvent;
 }
};
// a counter used to create unique IDs
dean_addEvent.guid = 1;

function removeEvent(element, type, handler) {
 if (element.removeEventListener) {
  element.removeEventListener(type, handler, false);
 } else {
  // delete the event handler from the hash table
  if (element.events && element.events[type]) {
   delete element.events[type][handler.$$guid];
  }
 }
};

function handleEvent(event) {
 var returnValue = true;
 // grab the event object (IE uses a global event object)
 event = event || fixEvent(((this.ownerDocument || this.document || this).parentWindow || window).event);
 // get a reference to the hash table of event handlers
 var handlers = this.events[event.type];
 // execute each event handler
 for (var i in handlers) {
  this.$$handleEvent = handlers[i];
  if (this.$$handleEvent(event) === false) {
   returnValue = false;
  }
 }
 return returnValue;
};

function fixEvent(event) {
 // add W3C standard event methods
 event.preventDefault = fixEvent.preventDefault;
 event.stopPropagation = fixEvent.stopPropagation;
 return event;
};
fixEvent.preventDefault = function() {
 this.returnValue = false;
};
fixEvent.stopPropagation = function() {
  this.cancelBubble = true;
}

// Dean's forEach: http://dean.edwards.name/base/forEach.js
/*
 forEach, version 1.0
 Copyright 2006, Dean Edwards
 License: http://www.opensource.org/licenses/mit-license.php
*/

// array-like enumeration
if (!Array.forEach) { // mozilla already supports this
 Array.forEach = function(array, block, context) {
  for (var i = 0; i < array.length; i++) {
   block.call(context, array[i], i, array);
  }
 };
}

// generic enumeration
Function.prototype.forEach = function(object, block, context) {
 for (var key in object) {
  if (typeof this.prototype[key] == "undefined") {
   block.call(context, object[key], key, object);
  }
 }
};

// character enumeration
String.forEach = function(string, block, context) {
 Array.forEach(string.split(""), function(chr, index) {
  block.call(context, chr, index, string);
 });
};

// globally resolve forEach enumeration
var forEach = function(object, block, context) {
 if (object) {
  var resolve = Object; // default
  if (object instanceof Function) {
   // functions have a "length" property
   resolve = Function;
  } else if (object.forEach instanceof Function) {
   // the object implements a custom forEach method so use that
   object.forEach(block, context);
   return;
  } else if (typeof object == "string") {
   // the object is a string
   resolve = String;
  } else if (typeof object.length == "number") {
   // the object is array-like
   resolve = Array;
  }
  resolve.forEach(object, block, context);
 }
};
div#main { margin-left:1%; margin-right:1%; }
table.sortable th:not(.sorttable_sorted):not(.sorttable_sorted_reverse):not(.sorttable_nosort):after {content: " \25B4\25BE"}
table.sortable tbody tr:nth-child(2n) td {background: #ffcccc;}
table.sortable tbody tr:nth-child(2n+1) td {background: #ccfffff;}
.sm { font-size:small; }
.text { text-align:center; }
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
 <head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>RuneScape Quest Checklist</title>
  <link rel="stylesheet" href="stylesheet.css" type="text/css" charset="utf-8">
  <script type="text/javascript" src="sorttable.js"></script>
 </head>
<body>
 <div id="main">
  <table class="sortable" border="0" cellpadding="0" cellspacing="0" width="100%">
   <thead>
    <tr>
     <th class="sorttable_nosort" title="Unsortable" style="width: 55px;"><strong>Done</strong></th>
     <th title="Click to sort"><strong>Quest Name</strong></th>
     <th title="Click to sort"><strong>Difficulty</strong></th>
     <th title="Click to sort"><strong>Length</strong></th>
     <th class="sorttable_nosort" title="Unsortable"><strong>Skill Req.</strong></th>
     <th class="sorttable_nosort" title="Unsortable"><strong>Quest Req.</strong></th>
     <th title="Click to sort"><strong>QP</strong></th>
     <th class="sorttable_nosort" title="Unsortable"><strong>Rewards</strong></th>
     <th title="Click to sort"><strong>Free/Members</strong></th>
    </tr>
   </thead>
   <tbody>
    <tr>
     <td class="sm text"><input name="done[1]" value="1" type="checkbox"></td>
     <td class="sm text">Quest Name</td>
     <td class="sm text"><div style="display: none;">1</div>Novice (to Grandmaster)</td>
     <td class="sm text"><div style="display: none;">1</div>Short (to Very Long)</td>
     <td class="sm text">Various Skills</td>
     <td class="sm text">Various Quests</td>
     <td class="sm text">1 (to 3)</td>
     <td class="sm">
      <ul>
       <li>Reward 1</li>
       <li>Reward 2</li>
       <li>etc...</li>
      </ul>
     </td>
     <td class="sm text">Membership req (or not)</td>
    </tr>
   </tbody>
  </table>
 </div>
</body>
</html>
Porthiir
  • 11
  • 1
  • 3
  • Possible duplicate of: [4709390/table-header-to-stay-fixed-at-the-top-when-user-scrolls-it-out-of-view-with-jque](http://stackoverflow.com/questions/4709390/table-header-to-stay-fixed-at-the-top-when-user-scrolls-it-out-of-view-with-jque). JQuery plugin: [mottie.github.io/tablesorter/docs/example-widget-sticky-header](http://mottie.github.io/tablesorter/docs/example-widget-sticky-header.html). Using CSS and HTML 'markup' is explained here: [www.cssbakery.com/2010/12/css-scrolling-tables-with-fixed](http://www.cssbakery.com/2010/12/css-scrolling-tables-with-fixed.html) – Ryan Vincent Sep 25 '14 at 05:02

2 Answers2

1

try like this example

this link also helpful to you. fixed header of table

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}
section {
  position: relative;
  border: 1px solid #000;
  padding-top: 37px;
  background: #500;
}
section.positioned {
  position: absolute;
  top: 100px;
  left: 100px;
  width: 800px;
  box-shadow: 0 0 15px #333;
}
.container {
  overflow-y: auto;
  height: 200px;
}
table {
  border-spacing: 0;
  width: 100%;
}
td + td {
  border-left: 1px solid #eee;
}
td,
th {
  border-bottom: 1px solid #eee;
  background: #ddd;
  color: #000;
  padding: 10px 25px;
}
th {
  height: 0;
  line-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  color: transparent;
  border: none;
  white-space: nowrap;
}
th div {
  position: absolute;
  background: transparent;
  color: #fff;
  padding: 9px 25px;
  top: 0;
  margin-left: -25px;
  line-height: normal;
  border-left: 1px solid #800;
}
th:first-child div {
  border: none;
}
<section class="">
  <div class="container">
    <table>
      <thead>
        <tr class="header">
          <th>
            Table attribute name
            <div>Table attribute name</div>
          </th>
          <th>
            Value
            <div>Value</div>
          </th>
          <th>
            Description
            <div>Description</div>
          </th>
        </tr>
      </thead>
      <tbody>
        <tr>
          <td>align</td>
          <td>left, center, right</td>
          <td>Not supported in HTML5. Deprecated in HTML 4.01. Specifies the alignment of a table according to surrounding text</td>
        </tr>
        <tr>
          <td>bgcolor</td>
          <td>rgb(x,x,x), #xxxxxx, colorname</td>
          <td>Not supported in HTML5. Deprecated in HTML 4.01. Specifies the background color for a table</td>
        </tr>
        <tr>
          <td>border</td>
          <td>1,""</td>
          <td>Specifies whether the table cells should have borders or not</td>
        </tr>
        <tr>
          <td>cellpadding</td>
          <td>pixels</td>
          <td>Not supported in HTML5. Specifies the space between the cell wall and the cell content</td>
        </tr>
        <tr>
          <td>cellspacing</td>
          <td>pixels</td>
          <td>Not supported in HTML5. Specifies the space between cells</td>
        </tr>
        <tr>
          <td>frame</td>
          <td>void, above, below, hsides, lhs, rhs, vsides, box, border</td>
          <td>Not supported in HTML5. Specifies which parts of the outside borders that should be visible</td>
        </tr>
        <tr>
          <td>rules</td>
          <td>none, groups, rows, cols, all</td>
          <td>Not supported in HTML5. Specifies which parts of the inside borders that should be visible</td>
        </tr>
        <tr>
          <td>summary</td>
          <td>text</td>
          <td>Not supported in HTML5. Specifies a summary of the content of a table</td>
        </tr>
        <tr>
          <td>width</td>
          <td>pixels, %</td>
          <td>Not supported in HTML5. Specifies the width of a table</td>
        </tr>
      </tbody>
    </table>
  </div>
</section>
Darshak Shekhda
  • 646
  • 5
  • 7
  • What I need to know is - how do I incorporate the above into my coding (I have NOW included in my original post)? As stated, all css is kept within the stylesheet file (as I have a few other people helping me edit these pages, and I don't want them messing with the css) – Porthiir Sep 25 '14 at 14:40
0

I have a nice/working solution with jQuery.

Assume your table's class is "fixed_header" then add following code:

CSS:

.fixed_header{position:relative; border-collapse: collapse;} 

JavaScript:

var originalHeader;
var floatingHeader;

$(document).ready(function () {
  var tableObj=$('.fixed_header'); //or other CSS selector as `#tableId`
  var tableBaseTop = tableObj.offset().top;
  originalHeader = $('.fixed_header tr:first-child'); //change CSS selector here also
  floatingHeader = originalHeader.clone();
  floatingHeader
    .css('position', 'absolute')
    .css('top', 0);
  setFloatingHeaderSize();
  tableObj.prepend(floatingHeader);

  $(window).scroll(function () {
    var windowTop = $(window).scrollTop();
    if (windowTop > tableBaseTop && windowTop < tableBaseTop + tableObj.height() - 100)
        floatingHeader.css('top', windowTop - tableBaseTop);
    else  floatingHeader.css('top', 0); //floating-header is just on Original-one
  });
  $(window).resize(setFloatingHeaderSize);
});

function setFloatingHeaderSize() {
  var originalThs = originalHeader.find('th');
  var floatingThs = floatingHeader.find('th');
  for (var i = 0; i < originalThs.length; i++) {
    floatingThs.eq(i)
        .css('width', originalThs.eq(i).width())
        .css('height', originalThs.eq(i).height());
  }
}

Best part of it, you don't need to change anything in you HTML, it'll directly work on any TABLE, just replace class-name(OR any other css-selector to that table) of table in which header should be fixed.

Concept: It creates a clone header(first row) and display above original one. We set the listener-function for window-scroll event AND when table-scrolled to TOP-of-Window then original one goes-up and clone one remains at top, coz we set it's margin-top to scrolled height. See at this line: if (windowTop > tableBaseTop && windowTop < tableBaseTop + tableObj.height() - 100).

Trick For Your Case: For your clickable feature on clone header, I would rather suggest you to apply your event listener on cloned-header, after cloning header(after following line): tableObj.prepend(floatingHeader);. Coz, cloned-header will be one top always, when user will click on any column-head, the event will we actually captured by cloned-header.

If your events are automatically set by any script(means not in your control), then either try putting(running) that script after above(my-js) OR apply click-event-listener on cloned-header's column for original-one, so that if anybody click then original's click event will also fire.

Code-ex:

function simulateClickOnOriginal() {
   var originalThs = originalHeader.find('th');
   var floatingThs = floatingHeader.find('th');
   for (var i = 0; i < floatingThs.length; i++) {
       floatingThs.eq(i).click(function(){
            originalThs.eq(i).trigger( "click" );
       });
   }
}
Adarsh Rajput
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