Photoshop - Resize Each Layer script

/*

    - Photoshop script ( cs3+ )
    - Put in {photoshop_root}/presets/scripts/Resize Each Layer.jsx
    - Run from: File > Scripts > Resize Each Layer
    - ..or save the file where ever you want and run from there with: File > Scripts > Browse...

    EVERY LAYER is resized when you run the script.

*/

/*

    <javascriptresource>
    <name>$$$/JavaScripts/resizeeachlayer/Menu=Resize Each Layer</name>
    <category>Resizing</category>
    <enableinfo>true</enableinfo>
    <eventid>64feff0a-8271-436f-8c59-d2105497d903</eventid>
    </javascriptresource>

*/

try {

        // Currently active document.
        var doc = app.activeDocument;

    // All layers
    var layers = doc.artLayers;

    // Run dialog...
    var size = dialog();

    // Loop through every layer...
    for( var i = 0 ; i < doc.artLayers.length; i++ ){

        var activeLayer = doc.artLayers.getByName( doc.artLayers[ i ].name  );

        // Save original ruler units
        var orUnits = app.preferences.rulerUnits;

        // Change rulerunits to percent
        app.preferences.rulerUnits = Units.PERCENT;

        // RESSIIIIIIIZE
        activeLayer.resize( size, size, AnchorPosition.MIDDLECENTER );

        // Roll back to original ruler units
        app.preferences.rulerUnits = orUnits;

    }


} // try end

catch( e ) {
    // remove comments below to see error for debugging
    // alert( e );
}


function dialog() {

    // Dialog box...
    var myWindow = new Window ("dialog", "Resize Each Layer");

    // Keeps things inline
    myWindow.orientation = "row";

    // Informational text
    myWindow.add ("statictext", undefined, "New size ( percentage ):");

    // This is the box where the size is inserted
    var myText = myWindow.add ("edittext", undefined, "");
    myText.characters = 5;
    myText.active = true;

    // Ok....
    myWindow.add ("button", undefined, "OK");
    if (myWindow.show () == 1) return myText.text;

}