var relationObj = new Object;
relationObj.page_now = 1;
relationObj.page_all = 0;

relationObj.load = function ()
{
  relationObj.view(1);
}

relationObj.prev = function ()
{
  if ( relationObj.page_now <= 1) {
    relationObj.page_now = relationObj.page_all;
  } else {
    relationObj.page_now--;
  }
  relationObj.view(relationObj.page_now);
}

relationObj.next = function ()
{
  if ( relationObj.page_now >= relationObj.page_all) {
    relationObj.page_now = 1;
  } else {
    relationObj.page_now++;
  }
  relationObj.view(relationObj.page_now);
}

relationObj.view = function ( number)
{
  var line = 0;
  var line_flg = 0;
  var e;
  var num = 0;
  while ( true) {
    e = document.getElementById("rel_" + line);
    if ( e) {
      line_flg = 0;
    } else {
      line_flg++;
    }
    if ( line_flg > 4) break;
    
    //---処理部
    if (e) {
      if ( num == (number-1)) {
        e.style.display = '';
      } else {
        e.style.display = 'none';
      }
      
      num++;
    }
    //---------
    
    line++;
    line_flg++;
  }
  
  relationObj.page_now = number;
  relationObj.page_all = num;
  
  document.getElementById("rel_pager").innerHTML = "ページ "+ relationObj.page_now +"/" + relationObj.page_all;
}