# If there are existing Internet Explorer processes, close it
$IE_Process = Get-Process iexplore -ErrorAction Ignore
if ($IE_Process) {
    $IE_Close = Foreach-Object { $IE_Process.CloseMainWindow() }
}

Stop-Process -Name "iexplore" -ErrorAction Ignore

# Login Information
$url = "http://xxx.xxx.xxx.xxx/"
$username = "xxxxxxxx"
$password = "xxxxxxxx"

# Open an IE process
$ie = New-Object -com internetexplorer.application;
$ie.silent = $true
$ie.navigate($url);
while ($ie.Busy -eq $true)
{
    Start-Sleep -s 1;
}

# The stupid webpage needs to submit twice
$ie.Document.getElementById("loginname").value = $username
$ie.Document.getElementByID("password").value = $password
$ie.Document.getElementById("button").Click()
Start-Sleep -s 1;
$ie.Document.getElementById("loginname").value = $username
$ie.Document.getElementByID("password").value = $password
$ie.Document.getElementById("button").Click()

# Close the IE process
$IE_Process = Get-Process iexplore -ErrorAction Ignore
if ($IE_Process) {
    $IE_Close = Foreach-Object { $IE_Process.CloseMainWindow() }
}

Stop-Process -Name "iexplore" -ErrorAction Ignore

Remove-Variable -Name ie,username,password,url,IE_Process -ErrorAction Ignore

C:WINDOWSsystem32WindowsPowerShellv1.0powershell.exe -ExecutionPolicy RemoteSigned -File C:UsersMyNameDocumentsPowershelllogin_IE.ps1

C:WINDOWSsystem32WindowsPowerShellv1.0powershell.exe

-ExecutionPolicy Unrestricted -File C:UsersMyNameDocumentsPowershelllogin_IE.ps1