Name
indexOf() — NN 2 IE J1 ECMA 1
Synopsis
indexOf(searchString
[,startPositionIndex]
)
Returns a zero-based integer of the position within the current
string where the searchString
parameter
starts. Normally, the search starts with the first (index of zero)
character, but you may have the search begin later in the string by
specifying the optional second parameter, which is the index value of
where the search should start. If there is no match, the returned
value is -1
. This is a backward-compatible quick
way to find out if one string contains another: If the returned value
is -1
then you know the
searchString
is not in the larger string.
If the returned value is another number (the precise value
doesn’t matter), the searchString
is
in the larger string. For Version 4 browsers, the
String
object’s search()
method performs a similar function.
Returned Value
Integer.
Parameters
-
searchString
A string to look for in the current string object
-
startPositionIndex
A zero-based integer indicating the position within the current string object to begin the search of the first parameter
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