Set-CellColor.ps1

ForEach ($Line in $InputObject)
{   If ($Line.IndexOf("<tr><th") -ge 0)
    {   $Search = $Line | Select-String -Pattern '<th ?[a-z\-:;"=]*>(.*?)<\/th>' -AllMatches
        $Index = 0
        ForEach ($Match in $Search.Matches)
        {   If ($Match.Groups[1].Value -eq $Property)
            {   Break
            }
            $Index ++
        }
        If ($Index -eq $Search.Matches.Count)
        {   Write-Warning "$(Get-Date): Unable to locate property: $Property in table header"
            Exit
        }
    }