fixedBox固定div漂浮代码支持ie6以上大部分主流浏览器_javascript技巧

$(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 = $(' '); 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
}); 
} 
}) 
}) 
})