Flash 8.
filter.saturation
Property; a float value that specifies the saturation value of the filter. Acceptable values are from -100 to 100. This property is defined for Filter objects with a value of "adjustColorFilter" for the filter.name property.
The following example sets the saturation value to -100 (grayscale) for the Adjust Color filters on the selected object(s):
var myFilters = fl.getDocumentDOM().getFilters();
for(i=0; i < myFilters.length; i++){
if(myFilters[i].name == 'adjustColorFilter'){
myFilters[i].saturation = 0-100;
}
}
fl.getDocumentDOM().setFilters(myFilters);