How to set document "dirty" flag

Question

Hi I wonder if there is a  simple way to set document "dirty" flag.
The thing is that I am modifing layer XMP info in action script but this change is not reflected by setting the document to modified state
Lukas

Answer 1

I wonder how fast it would be to set the currect layer colour?
IE:-
layerColour('red')
function layerColour(colour) {
    switch (colour.toLocaleLowerCase()){
        case 'red': colour = 'Rd  '; break;
        case 'orange' : colour = 'Orng'; break;
        case 'yellow' : colour = 'Ylw '; break;
        case 'yellow' : colour = 'Ylw '; break;
        case 'green' : colour = 'Grn '; break;
        case 'blue' : colour = 'Bl  '; break;
        case 'violet' : colour = 'Vlt '; break;
        case 'gray' : colour = 'Gry '; break;
        case 'none' : colour = 'None'; break;
        default : colour = 'None'; break;
    var desc = new ActionDescriptor();
        var ref = new ActionReference();
        ref.putEnumerated( charIDToTypeID('Lyr '), charIDToTypeID('Ordn'), charIDToTypeID('Trgt') );
    desc.putReference( charIDToTypeID('null'), ref );
        var desc2 = new ActionDescriptor();
        desc2.putEnumerated( charIDToTypeID('Clr '), charIDToTypeID('Clr '), charIDToTypeID(colour) );
    desc.putObject( charIDToTypeID('T   '), charIDToTypeID('Lyr '), desc2 );
    executeAction( charIDToTypeID('setd'), desc, DialogModes.NO );