2016年天宫一號:ExoBUD MP的播放清单设定问题～

<!--

//keyprocess
function returnfalse()
{return false; }

document.oncontextmenu = returnfalse
document.ondragstart = returnfalse
document.onselectstart = returnfalse

//error killer
function killerror() {return true;}
window.onerror = killerror;

//selectlist
var requeststr=document.location.search;
if(requeststr==""){
document.write ("<script language=\"javascript\" src=\".\/mplist1.js\"><\/script>");
}
if(requeststr=="?ntype=1&key=1"){document.write ("<script language=\"javascript\" src=\".\/mplist1.js\"><\/script>");}
if(requeststr=="?ntype=1&key=2"){document.write ("<script language=\"javascript\" src=\".\/mplist2.js\"><\/script>");}
if(requeststr=="?ntype=1&key=3"){document.write ("<script language=\"javascript\" src=\".\/mplist3.js\"><\/script>");}

//开始载入时切换简单模式
if(document.all){open_close();}

//-->

这是整个的代码，如果我想添加新的歌曲，应该在哪儿添加代码，怎么添加呢？
谢谢~~