surround a text node

[Fabrice Esti�venart]

i'd like to surround a selected text node with a user-defined tag called 
"meta:value". using the dom level 2 my javascript is something like this :

var range = selection.getRangeAt(0); (that range is supposed to enclose 
a text node)
var metaValue = editor.document.createElement("meta:value");

try{ range.surroundContents(metaValue);
}
catch(e){
        alert(e);
        }
that gives me the following exception : "Index or size is negative or 
greater than the allowed amount code" (NS_ERROR_DOM_INDEX_SIZE_ERR)

what's wrong ?

aTdHvAaNnKcSe

Fabrice

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