Encodes String objects so they can be read on all computers.
The required charString argument is any String object or literal to be encoded.
The escape function returns a string value (in Unicode format) that contains the contents of charstring. All spaces, punctuation, accented characters, and any other non-ASCII characters are replaced with %xx encoding, where xx is equivalent to the hexadecimal number representing the character. For example, a space is returned as "%20."
Characters with a value greater than 255 are stored using the %uxxxx format.
The escape function should not be used to encode Uniform Resource Identifiers (URI). Use encodeURI and encodeURIComponent functions instead.
Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards. See Version Information.