Flash 8.
filter.quality
Property; a string that specifies the blur quality. Acceptable values are "low", "medium", and "high" ("high" is similar to a Gaussian blur). This property is defined for Filter objects with a value of "bevelFilter", "blurFilter", "dropShadowFilter", "glowFilter", "gradientGlowFilter", or "gradientBevelFilter" for the filter.name property.
The following example sets the blur quality to "medium" for the Glow filters on the selected object(s):
var myFilters = fl.getDocumentDOM().getFilters();
for(i=0; i < myFilters.length; i++){
if(myFilters[i].name == 'glowFilter'){
myFilters[i].quality = 'medium';
}
}
fl.getDocumentDOM().setFilters(myFilters);