File: get_ancestor.js

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// From the current node, walk up the parent hierarchy until find a matching
// element matching one of the specified node names.
function get_ancestor(startNode, targetNodeNames) {
    var found = false;
    while( found == false && node != null ) {
        for( var i = 0; i < 1; i++ ) {
            if ( node.nodeName.toLowerCase() == targetNodeNames[i].toLowerCase() ) {
                return node;
            }
        }
        node = node.parentNode;
    }
    return node;
};