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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>fixedBox</title>
<script id="xcore" type="text/javascript" src="http://www.haiqiancun.com/xWidget-0.1/xcore.js"></script>
<style>
*{margin:0px;padding:0px;} body{height:3000px;}
</style>
<script>
$(function() { $(".fixedBox").each(function() {
var self = $(this);
var id = self.attr("id") || 'fixedBox_' + Math.round(Math.random() * 100000); self.attr("id", id);
var fb = $("#" + id);
var mt = Math.floor(fb.css("margin-top").substring(2, 0)) || 0;
var cd = $('<div style="height:' + fb.outerHeight() + 'px;display:none;' + fb.attr("style") + '"> </div>'); fb.after(cd); fb.css({
'z-index': 999
}).data({
'top': fb.offset().top,
'left': fb.offset().left
}); $(window).scroll(function() {
var pt = fb.data('top');
var pl = fb.data('left'); var st = $(document).scrollTop() - 10;
var h = $(document).height();
if (st > pt || st == pt) { cd.show();
if ((st + self.outerHeight()) > h) { self.css({
position: 'fixed',
top: (h - (st + self.outerHeight()))
});
} else { self.css({
position: 'fixed',
top: 0 - mt
});
}
} else { cd.hide(); self.css({
position: 'relative',
top: 0
});
}
})
})
})
</script>
</span>
</head>
<body>
<div style="width:90%;margin:0px auto;">
<div class="fixedBox" style="margin-top:50px; width:100%; overflow:hidden;background:#fff; font-size:12px;">
<script> $(function(){ $(".fixedBox").each(function(){
var self= $(this); var id = self.attr("id")||'fixedBox_'+Math.round(Math.random()*100000);
self.attr("id",id); var fb = $("#"+id); var mt = Math.floor(fb.css("margin-top").substring(2,0))||0;
var cd = $('<div style="width:100%;height:'+fb.outerHeight()+'px;display:none;'+fb.attr("style")+'"> </div>');
fb.after(cd); fb.css({'z-index':999}).data({'top':fb.offset().top,'left':fb.offset().left});
$(window).scroll(function(){ var pt = fb.data('top'); var pl = fb.data('left');
var st = $(document).scrollTop()-10; var h = $(document).height(); if(st>pt||st==pt){
cd.show(); if((st+self.outerHeight())>h){ self.css({position:'fixed',top:(h-(st+self.outerHeight()))});
}else{ self.css({position:'fixed',top:0-mt}); } }else{ cd.hide(); self.css({position:'relative',top:0});
} }) }) }) </script>
</div>
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</body>
</html>
原文http://www.haiqiancun.com/bbs/bbsPage/20140620170743/0/detail/20130727223854/1
