ie6 兼容height:100% , 和position:fiex

兼容height

_height:expression(document.body.offsetHeight+"px")

兼容fixed

_position:absolute;_left:expression(eval(document.documentElement.scrollLeft)+700);_top:expression(eval(document.documentElement.scrollTop)+300)

/* 修正IE6振动bug */
* html,* html body{background-image:url(about:blank);background-attachment:fixed}