//词条对战页头频道切换
function setContestHead(channelId){
var liObj = document.getElementById(channelId);
if(liObj!=null&&channelId!="contestIndex"){
var liaObj = document.getElementById(channelId+'_a');
var tempTxt = liaObj.innerHTML;
liaObj.innerHTML = tempTxt;
liObj.setAttribute("class","dh_no"); 
liObj.setAttribute("className","dh_no");
var indexLiObj = document.getElementById('contestIndex');
if(indexLiObj!=null){
indexLiObj.setAttribute("class","bor_l_no"); 
indexLiObj.setAttribute("className","bor_l_no");
indexLiObj.innerHTML='<a href="http://www.hudong.com/duizhan/index">活动首页</a>';
}
}else if(channelId=="all"){
var indexLiObj = document.getElementById('contestIndex');
if(indexLiObj!=null){
indexLiObj.setAttribute("class","bor_l_no"); 
indexLiObj.setAttribute("className","bor_l_no");
indexLiObj.innerHTML='<a href="http://www.hudong.com/duizhan/index">活动首页</a>';
}
}

}