摘要：其中_top:expression(eval(document.compatMode&&document.compatMode=='CSS1Compat')?documentElement.scrollTop+(documentElement.clientHeight-this.clientHeight)-0: document.body.scrollTop+(document.body.clientHeight-this.clientHeight)-0)这句代码应该是兼容IE6的代码,不像是CSS,但写在CSS里面.代码如下 1 <!DOCTYPE ht 阅读全文