Павленко Евгений 2

function isPossible (str1, str2) {
    var chars1 = str1.split('');
    var chars2 = str2.split('');
    var length = chars2.length;

    while (length--) {
        var pos = chars1.indexOf(chars2[length]);

        if (chars2[length] !== ' ') {
            if (-1 !== pos) {
                //Char exists in source string - remove it
                chars1.splice(pos, 1);
            } else {
                return false;
            }
        }

        //Char exists in result string - remove it
        chars2.splice(length, 1);
    }

    return true;
}

console.log(isPossible('clockwise', 'is clock'));//->true
console.log(isPossible('clockwise', 'is ccc'));//->false