Answer by learning... for Substring French text using javascript replaces the special characters

var byteLength = function(str) {            // returns the byte length of an utf8 string            var s = str.length;            for (var i=str.length-1; i>=0; i--) {                var code = str.charCodeAt(i);                if (code > 0x7f && code <= 0x7ff) s++;                else if (code > 0x7ff && code <= 0xffff) s+=2;                if (code >= 0xDC00 && code <= 0xDFFF) i--; //trail surrogate            }            return s;        }        var subStringTrim = function(str, maxLength){            if(!hasValue(str) || !hasValue(maxLength) || maxLength <= 0)                return str;            var strByteLength = byteLength(str);            if(strByteLength <= maxLength)                return str;            //pick upto maxlength            str = str.substr(0, maxLength);            //check the length again and then do sub string by calculating max newLength. This is important for french chars.             strByteLength = byteLength(str);            if(strByteLength <= maxLength)                return str; //english chars will get returned here            //removing extra chars for other than english            var newLength = maxLength - (strByteLength-maxLength);             if(newLength > 0)                str = str.substr(0, newLength);            return str;        }