function setTextBookDetails(stand, selbox) { selbox.options.length = 0;selbox.options[selbox.options.length] = new Option("Select Text Book Details", "0");if (stand == '1') {selbox.options[selbox.options.length] = new Option("English Course Book", "5");selbox.options[selbox.options.length] = new Option("Hindi (Part II)", "76");selbox.options[selbox.options.length] = new Option("Physics Part - 2", "84");selbox.options[selbox.options.length] = new Option("English Practice Book", "74");selbox.options[selbox.options.length] = new Option("Malayalam (Part II)", "75");selbox.options[selbox.options.length] = new Option("Arabic (Part II)", "77");selbox.options[selbox.options.length] = new Option("Urdu Reader (Part II)", "78");selbox.options[selbox.options.length] = new Option("Tamil (Part II)", "79");selbox.options[selbox.options.length] = new Option("Sanskrit (Part II)", "80");selbox.options[selbox.options.length] = new Option("Sanskrit (Sahitya)", "81");selbox.options[selbox.options.length] = new Option("Sanskrit (Sasthra)", "82");selbox.options[selbox.options.length] = new Option("Physics Part - 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