実際、私が答えたのと非常によく似た質問です。
$(function(){
$("table").stickyTableHeaders();
});
/*! Copyright (c) 2011 by Jonas Mosbech - https://github.com/jmosbech/StickyTableHeaders
MIT license info: https://github.com/jmosbech/StickyTableHeaders/blob/master/license.txt */
;(function ($, window, undefined) {
'use strict';
var pluginName = 'stickyTableHeaders';
var defaults = {
fixedOffset: 0
};
function Plugin (el, options) {
// To avoid scope issues, use 'base' instead of 'this'
// to reference this class from internal events and functions.
var base = this;
// Access to jQuery and DOM versions of element
base.$el = $(el);
base.el = el;
// Cache DOM refs for performance reasons
base.$window = $(window);
base.$clonedHeader = null;
base.$originalHeader = null;
// Keep track of state
base.isCloneVisible = false;
base.leftOffset = null;
base.topOffset = null;
base.init = function () {
base.options = $.extend({}, defaults, options);
base.$el.each(function () {
var $this = $(this);
// remove padding on <table> to fix issue #7
$this.css('padding', 0);
$this.wrap('<div class="divTableWithFloatingHeader"></div>');
base.$originalHeader = $('thead:first', this);
base.$clonedHeader = base.$originalHeader.clone();
base.$clonedHeader.addClass('tableFloatingHeader');
base.$clonedHeader.css({
'position': 'fixed',
'top': 0,
'z-index': 1, // #18: opacity bug
'display': 'none'
});
base.$originalHeader.addClass('tableFloatingHeaderOriginal');
base.$originalHeader.after(base.$clonedHeader);
// enabling support for jquery.tablesorter plugin
// forward clicks on clone to original
$('th', base.$clonedHeader).click(function (e) {
var index = $('th', base.$clonedHeader).index(this);
$('th', base.$originalHeader).eq(index).click();
});
$this.bind('sortEnd', base.updateWidth);
});
base.updateWidth();
base.toggleHeaders();
base.$window.scroll(base.toggleHeaders);
base.$window.resize(base.toggleHeaders);
base.$window.resize(base.updateWidth);
};
base.toggleHeaders = function () {
base.$el.each(function () {
var $this = $(this);
var newTopOffset = isNaN(base.options.fixedOffset) ?
base.options.fixedOffset.height() : base.options.fixedOffset;
var offset = $this.offset();
var scrollTop = base.$window.scrollTop() + newTopOffset;
var scrollLeft = base.$window.scrollLeft();
if ((scrollTop > offset.top) && (scrollTop < offset.top + $this.height())) {
var newLeft = offset.left - scrollLeft;
if (base.isCloneVisible && (newLeft === base.leftOffset) && (newTopOffset === base.topOffset)) {
return;
}
base.$clonedHeader.css({
'top': newTopOffset,
'margin-top': 0,
'left': newLeft,
'display': 'block'
});
base.$originalHeader.css('visibility', 'hidden');
base.isCloneVisible = true;
base.leftOffset = newLeft;
base.topOffset = newTopOffset;
}
else if (base.isCloneVisible) {
base.$clonedHeader.css('display', 'none');
base.$originalHeader.css('visibility', 'visible');
base.isCloneVisible = false;
}
});
};
base.updateWidth = function () {
// Copy cell widths and classes from original header
$('th', base.$clonedHeader).each(function (index) {
var $this = $(this);
var $origCell = $('th', base.$originalHeader).eq(index);
this.className = $origCell.attr('class') || '';
$this.css('width', $origCell.width());
});
// Copy row width from whole table
base.$clonedHeader.css('width', base.$originalHeader.width());
};
// Run initializer
base.init();
}
// A really lightweight plugin wrapper around the constructor,
// preventing against multiple instantiations
$.fn[pluginName] = function ( options ) {
return this.each(function () {
if (!$.data(this, 'plugin_' + pluginName)) {
$.data(this, 'plugin_' + pluginName, new Plugin( this, options ));
}
});
};
})(jQuery, window);
参照リンクを参照してください