fixedBox固定div漂浮代码支持ie6以上大部分主流浏览器

*{margin:0px;padding:0px;} body{height:3000px;}







<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>

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