//<!CDATA[
function g(o){return document.getElementById(o);}
function HoverLi(n){
//如果有N個標籤,就將i<=N;
//本功能非常OK,相容IE7,FF,IE6
for(var i=1;i<=4;i++){g('ctb_'+i).className='cnormaltab';g('ctbc_0'+i).className='cundis';}g('ctbc_0'+n).className='cdis';g('ctb_'+n).className='chovertab';
}