function selectTagA(showContent,selfObj,n){
    // 操作标签
    var tagA = document.getElementById("tagsA"+n).getElementsByTagName("li");
    for(i=1; i<tagA.length; i++){
	    tagA[i].className = "";
    }
    selfObj.parentNode.className = "selectTagA";
    // 操作内容
    for(i=0; j=document.getElementById("tagA"+n+"Content"+i); i++){
    	j.style.display = "none";
    }
    document.getElementById(showContent).style.display = "block";
}

function selectTagB(showContent,selfObj,n){
    // 操作标签
    var tagB = document.getElementById("tagsB"+n).getElementsByTagName("li");
    for(i=1; i<tagB.length; i++){
	    tagB[i].className = "";
    }
    selfObj.parentNode.className = "selectTagB";
    // 操作内容
    for(i=0; j=document.getElementById("tagB"+n+"Content"+i); i++){
    	j.style.display = "none";
    }
    document.getElementById(showContent).style.display = "block";
}