Scripts

the meta file:
<meta>
 <info author="Ahmed" name="login" />
 <script src="login.lua" type="client" />
</meta>

the script itself:
function createLoginWindow()
local X = 0.375
local Y = 0.375
local Width = 0.25
local Height = 0.25
wdwLogin = guiCreateWindow(X, Y, WIdth, Height, "Please Log In", true)

X = 0.0825
Y = 0.25
Width = 0.25
Length = 0.25
guiCreateLabel (X, Y, Width, Height, "Username", true, wdwLogin)
Y = 0.5
guiCreateLabel (X, Y, Width, Height, "Password", true, wdwLogin)


X = 0.415
Y= 0.2
Width = 0.2
Height = 0.15
X = 0.415
Y=0.2
Width = 0.5
Height = 0.15
edtUser = guiCreateEdit(X, Y, Width, Height, "...", true, wdwLogin)
Y = 0.5
edtPass = guiCreateEdit(X, Y, Width, Height, "....", true, wdwLogin)
guiEditSetMaxLength(edtUser, 50)
guiEditSetMaxLength(edtPass, 50)

X = 0.415
Y = 0.7
Width = 0.25
Height = 0.2
btnLogin = guiCreateButton(X, Y, Width, Height, "Log In", true, wdwLogin)
guiSetVisible(wdwLogin, false)
addEventHandler("onPlayerJoin", getResourceRootElement (),
       function ()
         createLoginWindow()

         outputChatBox("Welcome to My MTA:SA Server, Please log in")
         if (wdwLogin ~= nil) then
                 guiSetVisible(wdwLogin, true)
         else    outputChatBox("An unxpected error has occurred and the log in GUI has not been Created.")
         end
         showCursor(true)
         guiSetInputEnabled(true)
         end
         )
                  addEventHandler("onClientGUIClick", btnLogin, clientSubmitLogin, false)
function clientSubmitLogin(button,state)
        if button == "left" and state == "up" then
guiSetUpEnabled(false)
guiSetVisible(wdwLogin, false)
showCursor(false)
       else
outputChatBox("Please enter a username and password.")
       end
     end
end