--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/tableheader.js	Tue Dec 23 14:28:28 2008 +0100
@@ -0,0 +1,100 @@
+// $Id: tableheader.js,v 1.16 2008/01/30 10:17:39 goba Exp $
+
+Drupal.tableHeaderDoScroll = function() {
+  if (typeof(Drupal.tableHeaderOnScroll)=='function') {
+    Drupal.tableHeaderOnScroll();
+  }
+};
+
+Drupal.behaviors.tableHeader = function (context) {
+  // This breaks in anything less than IE 7. Prevent it from running.
+  if (jQuery.browser.msie && parseInt(jQuery.browser.version, 10) < 7) {
+    return;
+  }
+
+  // Keep track of all cloned table headers.
+  var headers = [];
+
+  $('table.sticky-enabled thead:not(.tableHeader-processed)', context).each(function () {
+    // Clone thead so it inherits original jQuery properties.
+    var headerClone = $(this).clone(true).insertBefore(this.parentNode).wrap('<table class="sticky-header"></table>').parent().css({
+      position: 'fixed',
+      top: '0px'
+    });
+
+    headerClone = $(headerClone)[0];
+    headers.push(headerClone);
+
+    // Store parent table.
+    var table = $(this).parent('table')[0];
+    headerClone.table = table;
+    // Finish initialzing header positioning.
+    tracker(headerClone);
+
+    $(table).addClass('sticky-table');
+    $(this).addClass('tableHeader-processed');
+  });
+
+  // Track positioning and visibility.
+  function tracker(e) {
+    // Save positioning data.
+    var viewHeight = document.documentElement.scrollHeight || document.body.scrollHeight;
+    if (e.viewHeight != viewHeight) {
+      e.viewHeight = viewHeight;
+      e.vPosition = $(e.table).offset().top - 4;
+      e.hPosition = $(e.table).offset().left;
+      e.vLength = e.table.clientHeight - 100;
+      // Resize header and its cell widths.
+      var parentCell = $('th', e.table);
+      $('th', e).each(function(index) {
+        var cellWidth = parentCell.eq(index).css('width');
+        // Exception for IE7.
+        if (cellWidth == 'auto') {
+          cellWidth = parentCell.get(index).clientWidth +'px';
+        }
+        $(this).css('width', cellWidth);
+      });
+      $(e).css('width', $(e.table).css('width'));
+    }
+
+    // Track horizontal positioning relative to the viewport and set visibility.
+    var hScroll = document.documentElement.scrollLeft || document.body.scrollLeft;
+    var vOffset = (document.documentElement.scrollTop || document.body.scrollTop) - e.vPosition;
+    var visState = (vOffset > 0 && vOffset < e.vLength) ? 'visible' : 'hidden';
+    $(e).css({left: -hScroll + e.hPosition +'px', visibility: visState});
+  }
+
+  // Only attach to scrollbars once, even if Drupal.attachBehaviors is called
+  //  multiple times.
+  if (!$('body').hasClass('tableHeader-processed')) {
+    $('body').addClass('tableHeader-processed');
+    $(window).scroll(Drupal.tableHeaderDoScroll);
+    $(document.documentElement).scroll(Drupal.tableHeaderDoScroll);
+  }
+
+  // Track scrolling.
+  Drupal.tableHeaderOnScroll = function() {
+    $(headers).each(function () {
+      tracker(this);
+    });
+  };
+
+  // Track resizing.
+  var time = null;
+  var resize = function () {
+    // Ensure minimum time between adjustments.
+    if (time) {
+      return;
+    }
+    time = setTimeout(function () {
+      $('table.sticky-header').each(function () {
+        // Force cell width calculation.
+        this.viewHeight = 0;
+        tracker(this);
+      });
+      // Reset timer
+      time = null;
+    }, 250);
+  };
+  $(window).resize(resize);
+};