/*第一种形式 第二种形式 更换显示样式*/
function setTab(name,cursel,n){
    for(i=1;i<=n;i++){
        var menu=document.getElementById(name+i);
        var con=document.getElementById("con_"+name+"_"+i);
        menu.className=i==cursel?"hover":"";
        con.style.display=i==cursel?"block":"none";
    }
}

function menuFix() {
    var sfEls = document.getElementById("nav").getElementsByTagName("li");
    for (var i=0; i<sfEls.length; i++) {
        sfEls[i].onmouseover=function() {
            this.className+=(this.className.length>0? " ": "") + "sfhover";
        }
        sfEls[i].onMouseDown=function() {
            this.className+=(this.className.length>0? " ": "") + "sfhover";
        }
        sfEls[i].onMouseUp=function() {
            this.className+=(this.className.length>0? " ": "") + "sfhover";
        }
        sfEls[i].onmouseout=function() {
            this.className=this.className.replace(new RegExp("( ?|^)sfhover\\b"),"");
        }
    }
}
//window.onload=menuFix;