function show_post(id) {
  if(id!=undefined) {
    if(document.getElementById('post_'+id)!=undefined) {
      for(i=0; i<document.getElementsByTagName('span').length; i++) {
       if(document.getElementsByTagName('span')[i].getAttribute('id').indexOf('post_')>-1) {
//       alert(document.getElementsByTagName('span')[i].getAttribute('id'));

          document.getElementsByTagName('span')[i].style.display = 'none';
        }
      }
      document.getElementById('post_'+id).style.display='block';

      for(i=0; i<document.getElementsByTagName('img').length; i++) {
       if(document.getElementsByTagName('img')[i].getAttribute('id').indexOf('post_image_')>-1) {
          document.getElementsByTagName('img')[i].style.display = 'none';
        }
      }
      document.getElementById('post_image_'+id).style.display='block';
    }
  }
}

function set_textsize(dir) {
  if(!document.getElementsByTagName("body")[0].style.fontSize) document.getElementsByTagName("body")[0].style.fontSize="12px";
  
  size = parseInt(document.getElementsByTagName("body")[0].style.fontSize);
  if(dir>1) size=dir;
  else size=size+dir;

  if(size<10) size=10;
  if(size>18) size=18;
  
  if(size>=15) {
    document.getElementsByTagName("body")[0].style.lineHeight="18px";
    for(i=0; i<document.getElementById('menu').getElementsByTagName('ul').length; i++)
      document.getElementById('menu').getElementsByTagName('ul')[i].style.height = '125px'
    
    document.getElementById('mainmenu').style.width = '140px';
    if(document.getElementById('submenu1')) document.getElementById('submenu1').style.width = '220px';
  }
  else if(size>=18) {
    document.getElementsByTagName("body")[0].style.lineHeight="21px";

    for(i=0; i<document.getElementById('menu').getElementsByTagName('ul').length; i++)
      document.getElementById('menu').getElementsByTagName('ul')[i].style.height = '140px'
    
    document.getElementById('mainmenu').style.width = '160px';
    if(document.getElementById('submenu1')) document.getElementById('submenu1').style.width = '240px';
  }
  else {
    document.getElementsByTagName("body")[0].style.lineHeight="15px";

    for(i=0; i<document.getElementById('menu').getElementsByTagName('ul').length; i++)
      document.getElementById('menu').getElementsByTagName('ul')[i].style.height = '105px'
    
    document.getElementById('mainmenu').style.width = '90px';
    if(document.getElementById('submenu1')) document.getElementById('submenu1').style.width = '171px';
  }
  
  document.getElementsByTagName("body")[0].style.fontSize = size+"px";
  
  document.cookie = 'dialogTextSize='+size;
  
}

function init_textsize() {
  if(document.cookie.indexOf('dialogTextSize')>-1)
  {
//    alert(document.cookie);
    cookie = document.cookie.split(";");
    for(i=0; i<cookie.length; i++)
    {
      if(cookie[i].indexOf('dialogTextSize')>-1)
      {
        cookie = cookie[i].split("=");
        break;
      }
    }
    set_textsize(parseInt(cookie[1]));
  }
}