function setImageData(
        uint _section_index
        
        
        
        
        
        
        
        
        
        
    ) {
        if (_section_index >= sections.length) throw;
        Section section = sections[_section_index];
        if(section.owner != msg.sender) throw;
        
        
        
        
        
        
        
        
        
        
        section.image_id = 0;
        section.md5 = "";
        section.last_update = block.timestamp;
        NewImage(_section_index);
    }