Flatten Nested Styles

FlattenNestedStyles.jsx

(function(a,e,g,c,b,n,j,i,t)
{
	for(a=a.stories[e='everyItem']()[g='getElements']();s=a.pop();)if((c=s.characters).length)
	{
		for(j=i=(b=c[e]().appliedNestedStyles).length;0<=i--;
        (n===(t=(b.pop()||0)[0]))||((n&&(c.itemByRange(1+i,j).appliedCharacterStyle=n)),j=i,n=t));
		for(b=s.paragraphs[e]().nestedStyles[e]()[g]();t=b.pop();
        t.isValid&&t.remove());
	}
})(app.activeDocument);