gistfile1.ps1

$Url = "http://www.example.com/path"
$Username="user" 
$Password="password" 
 

# Invoke Internet Explorer  
$IE = New-Object -com internetexplorer.application; 
$IE.visible = $true; 
$IE.navigate($Url); 
 
# Wait untill the page is loaded
while ($IE.Busy -eq $true) 
{  
   Start-Sleep -Milliseconds 2000; 
} 
# Fill login details
$IE.Document.getElementById("input_username").value = $Username; 
$IE.Document.getElementById("input_password").value = $Password;
# Click the submit button 
$IE.Document.getElementById("input_go").Click(); 
# Wait for the page to load 
while ($IE.Busy -eq $true) { Start-Sleep -Milliseconds 1000; }