如何在页脚之前停止固定小工具？

Question

大家好！在互联网上搜索与粘贴小工具相关的解决方案我在旁边找到了一个我喜欢的解决方案。但是，唯一的问题是它没有“打破”＃34;在页脚之前。我已经尝试了很多解决方案，但直到现在还没有成功。如果有人可以帮助我，我感谢！

这是原始剧本：

<script type='text/javascript'>
/*<![CDATA[*/
// Sticky Plugin
// =============
// Author: Anthony Garand
// Improvements by German M. Bravo (Kronuz) and Ruud Kamphuis (ruudk)
// Created: 2/14/2011
// Date: 9/12/2011
// Website: http://labs.anthonygarand.com/sticky
// Description: Makes an element on the page stick on the screen as you scroll
// For Blogger by : http://www.makingdifferent.com

(function($) {
var defaults = {
topSpacing: 0,
bottomSpacing: 0,
className: 'is-sticky',
center: false
},
$window = $(window),
$document = $(document),
sticked = [],
windowHeight = $window.height(),
scroller = function() {
var scrollTop = $window.scrollTop(),
documentHeight = $document.height(),
dwh = documentHeight - windowHeight,
extra = (scrollTop > dwh) ? dwh - scrollTop : 0;
for (var i = 0; i < sticked.length; i++) {
var s = sticked[i],
elementTop = s.stickyWrapper.offset().top,
etse = elementTop - s.topSpacing - extra;
if (scrollTop <= etse) {
if (s.currentTop !== null) {
s.stickyElement.css('position', '').css('top', '').removeClass(s.className);
s.currentTop = null;
}
}
else {
var newTop = documentHeight - s.elementHeight - s.topSpacing - s.bottomSpacing - scrollTop - extra;
if (newTop < 0) {
newTop = newTop + s.topSpacing;
} else {
newTop = s.topSpacing;
}
if (s.currentTop != newTop) {
s.stickyElement.css('position', 'fixed').css('top', newTop).addClass(s.className);
s.currentTop = newTop;
}
}
}
},
resizer = function() {
windowHeight = $window.height();
};

// should be more efficient than using $window.scroll(scroller) and $window.resize(resizer):
if (window.addEventListener) {
window.addEventListener('scroll', scroller, false);
window.addEventListener('resize', resizer, false);
} else if (window.attachEvent) {
window.attachEvent('onscroll', scroller);
window.attachEvent('onresize', resizer);
}

$.fn.sticky = function(options) {
var o = $.extend(defaults, options);
return this.each(function() {
var stickyElement = $(this);
if (o.center)
var centerElement = "margin-left:auto;margin-right:auto;";

stickyId = stickyElement.attr('id');
stickyElement
.wrapAll('<div id="' + stickyId + 'StickyWrapper" style="' + centerElement + '"></div>')
.css('width', stickyElement.width());
var elementHeight = stickyElement.outerHeight(),
stickyWrapper = stickyElement.parent();
stickyWrapper
.css('width', stickyElement.outerWidth())
.css('height', elementHeight)
.css('clear', stickyElement.css('clear'));
sticked.push({
topSpacing: o.topSpacing,
bottomSpacing: o.bottomSpacing,
stickyElement: stickyElement,
currentTop: null,
stickyWrapper: stickyWrapper,
elementHeight: elementHeight,
className: o.className
});
});
};
})(jQuery);
/*]]>*/
</script>