要完成此效果需要两个步骤 第一步：把如下代码加入到区域中 <script LANGUAGE="JavaScript"> counter = 0; html = true; mp3list = "#EXTM3U"; if(html) { mp3list += "
"; } mp3list += "\n"; file = ""; songs = new Array(); function addsong() { file = document.forms[0].file.value; file = file.toLowerCase(); if(file == "") { alert("按“浏览”选择一个文件"); } else { fn = file; char = unescape("%5C"); while(fn.indexOf(char) != -1) { pos = fn.indexOf(char); fn = fn.substring(pos + 1, fn.length); } if(fn.indexOf('.mp3') == -1) { alert("只能是MP3格式文件!"); } else { songs[counter] = file; document.forms[0].sofar[counter] = new Option((counter+1) + ": " + fn, file, false, true); counter++; } document.forms[0].file.value = ""; } } function finish() { if(counter == 0) { alert("请加入曲目到列表中!"); } else { mp3l = songs.length; for(i = 0; i < mp3l; i++) { if(songs[i] != "") { mp3list += songs[i]; if(html) { mp3list += "
" } mp3list += "\n" } } document.write(mp3list); if(html) { document.write(""); document.write("alert('创建一外空白文件,拷贝以下代码到文件中并保存为.m3u后缀的文件\\n\\n按浏览器返回按钮，回到编辑页面')"); document.write(""); } } document.forms[0].sofar.blur(); } function deletethis() { if(counter > 0) { counter--; document.forms[0].sofar[counter] = null; songs[counter] = ""; } else { alert("列表中无项目!"); } } </script> 第二步：把如下代码加入到区域中