function fo(id){return document.getElementById(id)}
function jumpTop(i){return}
var ua = navigator.userAgent.toLowerCase()
var isIE=(ua.indexOf("msie")!=-1 && ua.indexOf("opera")==-1)
var isIE5=(ua.indexOf("msie 5")!=-1)
var isOP=(ua.indexOf("opera")!=-1)
var isFF=(ua.indexOf("gecko")!=-1)