How to apply two paragraph Style to Table??

Hello,anyGod of the JS, i have two paragraphstyle, i want to apply to table.

Now i can only apply style to the table. but i dot't know how to apply columns i want to chosse.

pls help me      thankyou very mush^^

var myDoc=app.activeDocument;

    var    myParagraphStyle = myDoc.paragraphStyles.item("parastyle1");

var myTable = app.selection[0].convertToTable("\t","\r");

    myTable.rows.item(0).rowType = RowTypes.headerRow;

myTable.columns.item(0).width = "30 mm";

myTable.columns.item(1).width = "30 mm";

myTable.columns.item(2).width = "30 mm";

myTable.columns.item(0).width = "30 mm";

var celltable = myDoc.cellStyleGroups.item('Cell').cellStyles.item('Table');

myTable.cells.everyItem().appliedCellStyle = celltable;

    app.selection[0].applyParagraphStyle(myParagraphStyle, true);