Recursively reverse all nodes beneath Node n, and reverse Text nodes : Document « Development « JavaScript DHTML

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Recursively reverse all nodes beneath Node n, and reverse Text nodes

/*
Examples From
JavaScript: The Definitive Guide, Fourth Edition

Legal matters: these files were created by David Flanagan, and are
Copyright (c) 2001 by David Flanagan.  You may use, study, modify, and
distribute them for any purpose.  Please note that these examples are
provided "as-is" and come with no warranty of any kind.

David Flanagan
*/

// Recursively reverse all nodes beneath Node n, and reverse Text nodes
function reverse(n) { 
    if (n.nodeType == 3 /*Node.TEXT_NODE*/) { // Reverse Text nodes
        var text = n.data;                        // Get content of node
        var reversed = "";
        for(var i = text.length-1; i >= 0; i--)   // Reverse it
            reversed += text.charAt(i);
        n.data = reversed;                        // Store reversed text
    }
    else { // For non-Text nodes recursively reverse the order of the children
        var kids = n.childNodes;
        var numkids = kids.length;
        for(var i = numkids-1; i >= 0; i--) {       // Loop through kids
            reverse(kids[i]);                       // Recurse to reverse kid
            n.appendChild(n.removeChild(kids[i]));  // Move kid to new position
        }
    }
}

           
       

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