function selecttag(showcontent,selfobj){
	// 操作标签
	var tag = document.getelementbyid("tags").getelementsbytagname("a");
	var taglength = tag.length;
	for(i=0; i<taglength; i++){
		tag[i].classname = "";
	}
	selfobj.classname = "on";
	// 操作内容
	for(i=0; j=document.getelementbyid("tagcontent"+i); i++){
		j.style.display = "none";
	}
	document.getelementbyid(showcontent).style.display = "block";
}

function fontsize(s){
	  var ojb=document.getelementbyid("txt");
	  if(s==12)
	  {
		 ojb.classname="f12";
	  }
	  else if(s==16)
	  {
		 ojb.classname="f16";
	  }
	  else
	  {
		 ojb.classname="f14";
	  }
}

function show(id)
{
	document.getelementbyid("bb"+id).style.display="block";
	document.getelementbyid("ss"+id).classname="proon";
}
function hide(id)
{
	document.getelementbyid("bb"+id).style.display="none";
	document.getelementbyid("ss"+id).classname="prooff";
}