function expandNews(news_id){
    document.getElementById("news_short_content_" + news_id).style.display = "none";
    document.getElementById("news_long_content_" + news_id).style.display = "block";
}

function contract(news_id){
    document.getElementById("news_short_content_" + news_id).style.display = "block";
    document.getElementById("news_long_content_" + news_id).style.display = "none";
}