// JavaScript functions
function swapcontent(id){
    var titlepic={};
    if(!HTTP){
	alert("未加载HTTP对象");
	return false;
    }
    titlepic["205"]="images/swap/3_13.jpg";
    titlepic["206"]="images/swap/1_13.jpg";
    titlepic["207"]="images/swap/2_13.jpg";
    if(!(id in titlepic)){
	alert("无效ID");
	return false;
    }
    document.getElementById("titlepic").src=titlepic[id];
    HTTP.getText("getcontent.asp?clsid="+id,function(txt){
	    document.getElementById("swapcontent").innerHTML=txt;
	    });
    return false;
}