html head meta http-equiv="Content-Type" content="text/html; charset=gb2312" titlewww.joyrssmail.com/title script language=javascript function randompage(){ var randomindex=Math.floor(Math.random()*3)+1;//如果你有四个页面就把3改成4,如果有5个,就把3改成5 top.location.replace('index'+randomindex+'.htm')...