$ie = New-Object -com internetexplorer.application;

# In here there's more code to get you to the actual page, login, etc.

# Wait on page element to load or exit after 10 seconds
while ((-Not $ie.document.getElementsByClassName(" x-grid-panel x-component x-border x-masked")[0]) -and ($i -lt 100)) {
Start-Sleep -m 100;
try {
$i++
$ie.document.getElementById("gtn_auto_33").click()
} catch [System.Management.Automation.RuntimeException] {
# do not do anything and continue the while loop
}
}
$i = 0