JavaScript 1.2; JScript 3.0; ECMAScript v3
value, ...
One or more values to be concatenated to string.
A new string that results from concatenating each of the arguments to string.
concat( ) converts each of its arguments to a string (if necessary) and appends them, in order, to the end of string. It returns the resulting concatenation. Note that string itself is not modified.
String.concat( ) is an analog to Array.concat( ). Note that it is often easier to use the + operator to perform string concatenation.