How can I send russian symbols from JS to Unity WebGL

I use .jslib and SendMessage, to communicate Unity and JS. All works fine, but when i send to unity russian symbols, it's look like "english, русский" - > "english, ". JS-> console.log-> https://pp.vk.me/c615829/v615829996/10668/QQfJ6X7bO2Y.jpg Unity WebGL-> https://pp.vk.me/c615829/v615829761/12aa6/w1RBJ-2pLOE.jpg How can I fix this?