Is nodeIndex a valid DOM element property in IE?
I came across some javascript at work today that used [jQuery](http://www.jquery.com) to fetch two elements. It then used elem.nodeIndex to determine the position in the elements parent for each element. Nothing is setting this property anywhere and I do now see a reference to it in the [msdn](http://msdn.microsoft.com/en-us/library/ms533055(VS.85).aspx), [mdc](https://developer.mozilla.org/en/DOM/element#Properties), or anywhere else. 

I stepped through this javascript in [FireFox](mozilla.com) with [FireBug](http://getfirebug.com/) and tested the code in chrome and opera. I am sure nothing was trying to set this property. However, I can't find any information on this nodeIndex property anywhere.

Does nodeIndex exist as a DOM property in IE, or did I miss something while debugging my code?
Is nodeIndex a valid DOM element property in IE?
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I came across some javascript at work today that used [jQuery](http://www.jquery.com) to fetch two elements. It then used elem.nodeIndex to determine the position in the elements parent for each element. Nothing is setting this property anywhere and I do now see a reference to it in the [msdn](http://msdn.microsoft.com/en-us/library/ms533055(VS.85).aspx), [mdc](https://developer.mozilla.org/en/DOM/element#Properties), or anywhere else. 

I stepped through this javascript in [FireFox](mozilla.com) with [FireBug](http://getfirebug.com/) and tested the code in chrome and opera. I am sure nothing was trying to set this property. However, I can't find any information on this nodeIndex property anywhere.

Does nodeIndex exist as a DOM property in IE, or did I miss something while debugging my code?