Searches the text for a particular substring, returning the positional index of the first character of the first match.
search( search_text, within_text, start_num )
search_text: (Text) The text that will be searched for.
within_text: (Text) The text within which the search text will be searched for.
start_num: (Number) The positional index of the first character of the substring to be returned.
The search_text parameter does not support wildcard characters.
The first character of the entire within_text value is considered to have an index = 1.
find(): Use this function to perform a case-sensitive search.