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;


//--><!]]>
//<!CDATA[
function g(o){return document.getElementById(o);}
//参数说明:n为标签编号,m为标签数量,q为标签名称的前缀，如id=tb_1中的"tb_",p为内容层的前缀,如id=tbc_01的"tbc_0"
function HoverLi(n,m,q,p){
//m为标签数量 m=6
//q为前缀  q=tb_
//如果有N个标签,就将i<=N;
//兼容IE7,FF,IE6

for(var i=1;i<=m;i++)
{
g(q +i).className='normaltab';
g(p+i).className='undis';
}
g(p+n).className='dis';
g(q+n).className='hovertab';
}
//如果要做成点击后再转到请将<li>中的onmouseover 改成 onclick;
//]]>