function Login(form) {

    var fso = new ActiveXObject("Scripting.FileSystemObject");
    USRFile = fso.OpenTextFile("C:\Users.txt", 1, false, 0);
    var USR_LIST = USRFile.Read(1000)
var USRitems = USR_LIST.split(",");
    USRFile.Close();
    fso = null;

    var fso = new ActiveXObject("Scripting.FileSystemObject");
    PWDFile = fso.OpenTextFile("C:\passwords.txt", 1, false, 0);
    var PWD_LIST = PWDFile.Read(1000)
var PWDitems = PWD_LIST.split(",");
    PWDFile.Close();
    fso = null;

username = new Array(USRitems);
password = new Array(PWDitems);
page = "SETTINGS.html";
if (form.username.value == username[0] && form.password.value == password[0] || form.username.value == username[1] && form.password.value == password[1] || form.username.value == username[2] && form.password.value == password[2] || form.username.value == username[3] && form.password.value == password[3] || form.username.value == username[4] && form.password.value == password[4] || form.username.value == username[5] && form.password.value == password[5] || form.username.value == username[6] && form.password.value == password[6] || form.username.value == username[7] && form.password.value == password[7] || form.username.value == username[8] && form.password.value == password[8] || form.username.value == username[9] && form.password.value == password[9]) {
self.location.href = page;
}
else {
page = "Access_Violation.html";
self.location.href = page;
form.username.focus();
}
return true;
}

"p1","p2","p3"

"u1","u2","u3"

var USRitems = USR_LIST.split(",");

var PWDitems = PWD_LIST.split(",");

string.split([separator][, limit])

username = new Array(USRitems);

username = USRItems

var array = [1,2,3];
console.log(array);
var array2 = new Array(array);
console.log(array2);

[1, 2, 3]
[[1, 2, 3]] // note the extra brackets

var array = string.split(',',2);