摘要：
用途一："返回顶部"；window.onscroll = function(){ var t = document.documentElement.scrollTop || document.body.scrollTop; var top_div = document.getElementById( "top_div" ); if( t >= 300 ) { top_div.style.display = "inline"; } else { top_div.style.display = "none"; } 阅读全文
摘要：
普通css代码.fix_foot{height: 30px; background: #ff0000; position: fixed; bottom: 0px; width: 100%; z-index:10;}ie6兼容代码* html,* html body{background-image:url(about:blank);background-attachment:fixed}* html .fix_foot{position:absolute;left:expression(eval(document.documentElement.scrollLeft));top:express 阅读全文