getElementByTagName needs tests

Found this..
JS strict warning #156 in env.js at line 1738 - assignment to undeclared variable nodeList

which lead to this in node.js

    getElementsByTagName : function(tagname) {
        // delegate to _getElementsByTagNameRecursive                                                                      
        // recurse childNodes                                                                                              
    var nodelist = new NodeList(__ownerDocument__(this));
        for(var i = 0; i < this.childNodes.length; i++) {
            nodeList = __getElementsByTagNameRecursive__(this.childNodes.item(i), tagname, nodelist);
        }
        return nodelist;
    },

looks like nodeList vs nodelist. Might have been caused by me with some editor problem.

Need tests.