원하는 byte만큼 글자를 잘라줌

cutByteLength(title,parseInt(title_size)
 
 
// 원하는 byte만큼 글자를 잘라줌
function cutByteLength(s, len) {
 
    if (s == null || s.length == 0) {
        return 0;
    }
    var size = 0;
    var rIndex = s.length;
 
    for ( var i = 0; i < s.length; i++) {
        size += charByteSize(s.charAt(i));
        if( size == len ) {
            rIndex = i + 1;
            break;
        } else if( size > len ) {
            rIndex = i;
            break;
        }
    }
 
    return s.substring(0, rIndex);
}
function charByteSize(ch) {
 
    if (ch == null || ch.length == 0) {
        return 0;
    }
 
    var charCode = ch.charCodeAt(0);
 
    if (charCode <= 0x00007F) {
        return 1;
    } else if (charCode <= 0x0007FF) {
        return 2;
    } else if (charCode <= 0x00FFFF) {
        return 3;
    } else {
        return 4;
    }
}