#include <IE.au3>

Local $oUser, $oPass, $oSubmit
Local $sUser = "username"
Local $sPass = "password"
Local $url = "https://www.ucern.com"
Local $oIE = _IECreate($url, 1)

_IELoadWait($oIE)

$oInputs = _IETagNameGetCollection($oIE, "input")
for $oInput in $oInputs
    if $oInput.type = "text" And $oInput.id = "login-username" And $oInput.name = "Ecom_User_ID" Then $oUser = $oInput
    if $oInput.type = "password" And $oInput.id = "login-password" And $oInput.name = "Ecom_Password" Then $oPass = $oInput
    if $oInput.type = "image" And $oInput.value = "Login" Then $oSubmit = $oInput
    if isObj($oUser) And isObj($oPass) And isObj($oSubmit) then exitloop
Next

$oUser.value = $sUser
$oPass.value = $sPass
_IEAction($oSubmit, "click")

_IELoadWait($oIE)

;This script works on UCern.com and https://secure.williams-int.com/customers/login.asp
;Search for Website Login Script by Sean78 or roc. The Sean78 one worked.