Function not working on Powershell v1

Hi All,

I found this great function online that will change the colour of an HTML table cell based on value. It works great when testing (powershell v2) however our prod servers are running Powershell v1 and it fails becasue it doesnt recognise the parameters syntax.

Any suggestions?

[CmdletBinding()]
    Param (
        [Parameter(Mandatory,Position=0)]
        [string]$Property,
        [Parameter(Mandatory,Position=1)]
        [string]$Color,
        [Parameter(Mandatory,ValueFromPipeline)]
        [Object[]]$InputObject,
        [Parameter(Mandatory)]
        [string]$Filter
    )
    Begin {
        Write-Verbose "$(Get-Date): Function Set-CellColor begins"
        If ($Filter)
        {   If ($Filter.ToUpper().IndexOf($Property.ToUpper()) -ge 0)
            {   $Filter = $Filter.ToUpper().Replace($Property.ToUpper(),"`$Value")
                Try {
                    [scriptblock]$Filter = [scriptblock]::Create($Filter)
                }
                Catch {
                    Write-Warning "$(Get-Date): ""$Filter"" caused an error, stopping script!"
                    Write-Warning $Error[0]
                    Exit
                }
            }
            Else
            {   Write-Warning "Could not locate $Property in the Filter, which is required.  Filter: $Filter"
                Exit
            }
        }
    }
    Process {
        ForEach ($Line in $InputObject)
        {   If ($Line.IndexOf("<tr><th") -ge 0)
            {   Write-Verbose "$(Get-Date): Processing headers..."
                $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: $Property in table header"
                    Exit
                }
                Write-Verbose "$(Get-Date): $Property column found at index: $Index"
            }
            If ($Line.IndexOf("<tr><td") -ge 0)
            {   $Search = $Line | Select-String -Pattern '<td ?[a-z\-:;"=]*>(.*?)<\/td>' -AllMatches
                $Value = $Search.Matches[$Index].Groups[1].Value -as [double]
                If (-not $Value)
                {   $Value = $Search.Matches[$Index].Groups[1].Value
                }
                If (Invoke-Command $Filter)
                {   Write-Verbose "$(Get-Date): Criteria met!  Changing cell to $Color..."
                    $Line = $Line.Replace($Search.Matches[$Index].Value,"<td style=""background-color:$Color"">$Value</td>")
                }
            }
            Write-Output $Line
        }
    }
    End {
        Write-Verbose "$(Get-Date): Function Set-CellColor completed"
    }
}