js转string为byte[]

function stringToBytes ( str ) { var ch, st, re = []; for (var i = 0; i < ; i++ ) { ch = (i); // get char st = []; // set up "stack" do { ( ch & 0xFF ); // push byte to stack ch = ch >> 8; // shift value down by 1 byte } while ( ch ); // add stack contents to result // done because chars have "wrong" endianness re = ( () ); } // return an array of bytes return re; } stringToBytes( "A/u1242B/u4123C" ); // [65, 18, 66, 66, 65, 35, 67]