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I'm trying to use _FFCmd to remove some child elements (and replace other child elements), but with no luck.

Simple example:

#include <FF.au3>
If Not _FFIsConnected() Then _FFConnect()
$eDoc = "window.content.top.document"
$eNLHSL1 = ".getElementsByClassName('NLHSL1')"
$iNLHSL1Length = _FFCmd($eNLHSL1 & ".length")
For $i = 0 To $iNLHSL1Length - 1
    $cmdNLHSL1 = _FFCmd(".documentElement.removeChild(" & $eDoc & $eNLHSL1 & "[" & $i & "]);")
Running:(\Program Files\AutoIt3\autoit3.exe "C:\Documents and Settings\...\My Documents\Scripts\removechild.au3"    
__FFStartProcess: ""C:\Program Files\Mozilla Firefox\firefox.exe" -new-window "http://www.autoitscript.com/"  -repl 4242 
_FFConnect: OS: WIN_XP WIN32_NT 2600 Service Pack 3
_FFConnect: AutoIt:
_FFConnect: FF.au3:
_FFConnect: IP:
_FFConnect: Port:   4242
_FFConnect: Delay:  2ms
_FFConnect: Socket:     1672
_FFConnect: Browser:    Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729)
__FFSendJavascripts: Sending functions to FireFox .......... done
_FFLoadWait: . loaded in 15ms
__FFSend: try{FFau3 != null?1:0}catch(e){'_FFCmd_Err';};
__FFRecv: 1
__FFSend: try{window.content.top.document.getElementsByClassName('NLHSL1').length}catch(e){'_FFCmd_Err';};
__FFRecv: 5
__FFSend: try{window.content.top.document.documentElement.removeChild(window.content.top.document.getElementsByClassName('NLHSL1')[0]);}catch(e){'_FFCmd_Err';};
__FFRecv: _FFCmd_Err
__FFSend: try{window.content.top.document.documentElement.removeChild(window.content.top.document.getElementsByClassName('NLHSL1')[1]);}catch(e){'_FFCmd_Err';};
__FFRecv: _FFCmd_Err
__FFSend: try{window.content.top.document.documentElement.removeChild(window.content.top.document.getElementsByClassName('NLHSL1')[2]);}catch(e){'_FFCmd_Err';};
__FFRecv: _FFCmd_Err
__FFSend: try{window.content.top.document.documentElement.removeChild(window.content.top.document.getElementsByClassName('NLHSL1')[3]);}catch(e){'_FFCmd_Err';};
__FFRecv: _FFCmd_Err
__FFSend: try{window.content.top.document.documentElement.removeChild(window.content.top.document.getElementsByClassName('NLHSL1')[4]);}catch(e){'_FFCmd_Err';};
__FFRecv: _FFCmd_Err
+>11:34:41 AutoIT3.exe ended.rc:0
>Exit code: 0    Time: 6.099
I'm new to DOM programming, so any help would be appreciated. Thanks in advance!
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Well, I found something that works:

#include <FF.au3>
$eDoc = "window.content.top.document"
$eNLHSL1 = ".getElementsByClassName('NLHSL1')"
    $cmdNLHSL1 = _FFCmd($eNLHSL1 & "[0].parentNode.removeChild(" & $eDoc & $eNLHSL1 & "[0]);")
Until $cmdNLHSL1 = "_FFCmd_Err"

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