What is the function to change paragraph styles?

Question

I'm trying to make a simple script that changes a raw data file that has preset Paragraph style already in the exported data from a HTML calender, and once its copied over into Indesign it changes the already existing paragraph style into a diffrent paragrph style?
is this a simple script, I got no idea what the script function is to make the change of paragraphs.

Answer 1

Would this work? or do I got the wrong function commands?
var myInDesign = app
var myDocument = app.activeDocument
var myDocName = myDocument.name
app.findParagraphStyle.caseSensitive = false;
app.findParagraphStyle.wholeWord = false;
app.findCharacterStyle.wholeWord = false;
app.findCharacterStyle.caseSensitive = false;
app.findParagraphStyle.findWhat = "SN.outabout.DAY-Gray";
app.changeParagraphStyle.changeTo = "SN.Holiday-Day_of_the_week";
app.documents.item(0).changeParagraphStyle();
app.findParagraphStyle.findWhat = "SN.outabout.DATE";
app.changeParagraphStyle.changeTo = "SN.Holiday-Month_and_Day";
app.documents.item(0).changeParagraphStyle();
app.findParagraphStyle.findWhat = "SN.listingsLT";
app.changeParagraphStyle.changeTo = "SN.Holiday-Paragraph";
app.documents.item(0).changeParagraphStyle();
app.findCharacterStyle.findWhat = "SN.listingsBOLD";
app.changeCharacterStyle.changeTo = "SN.Holiday-Title_Paragraph";
app.documents.item(0).changeCharacterStyle();
//myInCopy = CreateObject("InCopy.Application.CS3")  //Not sure if this would work, just crafting idea's.
//var myDocument = myInCopy.ActiveDocument
//var mySelection = myInCopy.Selection.Item(1)
//var myStory = MySelection.ParentStory
//var myText = myStory.Paragraphs.Item(1)
//myStory.CheckOut
//myText.ApplyParagraphStyle myDocument.ParagraphStyles.Item("zAPPROVED"), True
//myStory.CheckIn
Can I just do this with like a Nested If, then Statement?