... three parameters: the error message, the URL of the document in which the error occurred, and the line of the error Example: function alertError (the_ message, the_ url, the_ line) { var the_ string = ... parameters: the position of the first character of the substring and the length of the substring Similar to the substring() method Example: var the_ string = "core"; var the_ extract = the_ string.substr(1, ... searching If the string contains the substring, indexOf() returns the position of the substring within the string If the string does not contain the substring, indexOf() returns For example: var the_ string...