// JavaScript Document
function selectTag(showContent,selfObj){
        // 操作标签
     var tabtag = selfObj.parentNode.getElementsByTagName("li");
     var tabtaglength = tabtag.length;
      for(i=0; i<tabtaglength; i++){
           tabtag[i].className = "";
        }
		selfObj.className = "selected";
        // 操作内容
		
     var content = document.getElementById(showContent).parentNode.getElementsByTagName("div");
	 
			  var contentlength = content.length; 
			   for(k=0; k<contentlength; k++){
                content[k].style.display = "none";
       		   }
        
        document.getElementById(showContent).style.display = "block";
}