removeContent(os1,os2+len2-os1);
removeContent(os1,os2+len2-os1+1);
    public void removeAttribute(int attrNameIndex) throws ModifyException{        if (md == null)            throw new IllegalArgumentException("MasterDocument can't be null");        int type = md.getTokenType(attrNameIndex);        if (type != VTDNav.TOKEN_ATTR_NAME&& type != VTDNav.TOKEN_ATTR_NS)            throw new ModifyException("token type should be attribute name");        int os1 = md.getTokenOffset(attrNameIndex);        int os2 = md.getTokenOffset(attrNameIndex+1);        int len2 = md.getTokenLength(attrNameIndex+1);   	    if (md.getEncoding() < VTDNav.FORMAT_UTF_16BE)   	        removeContent(os1,os2+len2-os1); 	    else 	        removeContent(os1<<1,(os2+len2-os1)<<1); 		        }