function selectTag(showContent,k){
	// 操作標簽
	//var tag = document.getElementById("tags").getElementsByTagName("td");
	//var taglength = tag.length;
	//for(i=0; i<taglength; i++){
		//tag[i].className = "";
	//}
//tag[k].className = "taglink0";
//changeClass('myTab' + k, 'tab_active');
            for (i = 0; i <= 3; i++) {
                if (i == k) { changeClass('myTab' + i, 'tab_active');  }
                else { changeClass('myTab' + i, 'tab');  }
            }
	// 操作內容
	for(i=0; j=document.getElementById("tagContent"+i); i++){
		j.style.display = "none";
	}
	document.getElementById(showContent).style.display = "block";

}

        function changeClass(Elem, myClass) {
            var elem;
            if (document.getElementById) {
                var elem = document.getElementById(Elem);
            } else if (document.all) {
                var elem = document.all[Elem];
            }
            elem.className = myClass;
        }