Bullet style

Dear Friends;

I am the beginner in javascript, my request is applied all bullet paras applied paragraph style is "CN":

var myDoc = app.documents.item(0);

var myPages = myDoc.pages.textFrames.everyItem().paragraphs.everyItem().getElements();

for (i =0; i<myPages.length; i++)

{

var myPage = myPages [i];

{

if (myPage == bulletsAndNumberingListType.BULLET_LIST.appliedParagraphStyle.name("BL"))

    }

}

It is shows error.

Thanks

kanaga kumar. k