js文件操作封装类

function getlocal(){
    //得到本地路径
    temp = window.location+".txt";
    temp = temp.substr(8);
    temp=temp.split("/")
    temp.pop()
    str=temp.join("/")+"/"
    return str
}


function writefile(name, str, always){
    //写文件[name:文件名,str:字符,always:是否覆盖]
    //用法:writefile("文件名", "新文件", true)
    var fso, f;
    if (always) {
        fso = new ActiveXObject("Scripting.FileSystemObject");
        f = fso.OpenTextFile(getlocal()+name, 2, true);
        f.Write(str);
        f.Close();
        return true;
    } else {
        if (!isfile(name)){
            fso = new ActiveXObject("Scripting.FileSystemObject");
            f = fso.OpenTextFile(getlocal()+name, 2, true);
            f.Write(str);
            f.Close();
            return true;
        } else {
            return false;
        }
    }
}


function readfile(name) {
    //读取一个文件,如果存在返回字符,如不存在返回flash
    if (isfile(name)) {
        var fso, f;
        fso = new ActiveXObject("Scripting.FileSystemObject");
        f = fso.OpenTextFile(getlocal()+name, 1);
        str = f.ReadAll();
        f.Close();
        return (str);
    } else {
        return false;
    }
}


function createfolder(name){
    //创建一个文件夹
    if (!isfolder(name)) {
        var fso, f;
        fso = new ActiveXObject("Scripting.FileSystemObject");
        fso.CreateFolder(getlocal()+name);
        return true;
    } else {
        return false;
    }
}


function deletefolder(name) {
    //删除一个文件夹
    if (isfolder(name)) {
        var fso, f;
        fso = new ActiveXObject("Scripting.FileSystemObject");
        fso.DeleteFolder(getlocal()+name);
        return true
    } else {
        return false;
    }
}


function isfile(name){
    //文件是否存在
    var fso, exis;
    fso = new ActiveXObject("Scripting.FileSystemObject");
    exis=fso.FileExists(getlocal()+name);
    return exis
}


function isfolder(name){
    //文件夹是否存在
    var fso, exis;
    fso = new ActiveXObject("Scripting.FileSystemObject");
    exis=fso.FolderExists(getlocal()+name);
    return exis
}


function viewfolder(name) {
    //查看一个文件夹并返回所有文件的名
    if (isfolder(name)) {
        var fso, f;
        fso = new ActiveXObject("Scripting.FileSystemObject");
        f = fso.GetFolder(getlocal()+name).files;
        str = "";
        for (var objEnum = new Enumerator(f); !objEnum.atEnd(); objEnum.moveNext())
        {
            temp = String(objEnum.item()).split("/").pop();
            str += temp+"|";

        }
        return str
    } else {
        return false;
    }
}