The encodeURI(...) function has only one variation, not counting syntax variations.  It makes a copy of a String value converting all characters except letter, numbers and the forward slash to URI escape sequences.  For non-ASCII characters a UTF-8 encoding is used.  A URI escape sequence consists of the percent sign followed by a two digit hexidecimal value corresponding to the numeric value of the byte.

Syntax:
encodeURI( source-string )
source-string.encodeURI( )

Parameter	Description
source-string	The String to encode.