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Flash Player 5.
my_str.indexOf(substring,[startIndex])
substring An integer or string specifying the substring to be searched for within my_str.
startIndex An optional integer specifying the starting point in my_str to search for the substring.
The position of the first occurrence of the specified substring, or -1.
Method; searches the string and returns the position of the first occurrence of substring found at or after startIndex within the calling string. If substring is not found, the method returns -1.
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