function jsTrim(st) {
    var len = st.length;
    var left = 0, right = len - 1;
    while ((left < len) && (st.charAt(left) == " " || st.charAt(left) == "\u000A" || st.charAt(left) == "\u000D")) {
        left++;
    }
    while ((left < right) && (st.charAt(right) == " " || st.charAt(right) == "\u000A" || st.charAt(right) == "\u000D")) {
        right--;
    }
    return st.substring(left, right + 1);
}