function show_new(){
  var currentTime=new Date();
  document.getElementById("main_body_news").innerHTML="<img src='../common/graphics/loader.gif' style='margin-top:10px; margin-bottom:10px; border:1px solid #808080'>";
  ajax("blocks/new_block.php?ajax_na=8&t="+currentTime.getTime(),"main_body_news");
}

function show_disc(){
  screen_width=(document.getElementById("main_body_forum").offsetWidth);
  strlen=Math.floor((screen_width)/5)-33; 
  var currentTime=new Date();
  document.getElementById("main_body_forum").innerHTML="<img src='../common/graphics/loader.gif' style='margin-top:10px; margin-bottom:10px; border:1px solid #808080'>";
  ajax("blocks/disc_block.php?ajax_strlen="+strlen+"&t="+currentTime.getTime(),"main_body_forum");
}

function show_eshop(){
  var currentTime=new Date();
  document.getElementById("main_body_eshop").innerHTML="<img src='../common/graphics/loader.gif' style='margin-top:10px; margin-bottom:10px; border:1px solid #808080'>";
  ajax("blocks/eshop_block.php?ajax=1&t="+currentTime.getTime(),"main_body_eshop");
}

function show_photo(){
  screen_width=(document.getElementById("main_body_photo").offsetWidth);
  //120+2*2+2*1+2*5=136
  pa=(Math.floor(screen_width/136)*2); 
  var currentTime=new Date();
  document.getElementById("main_body_photo").innerHTML="<img src='../common/graphics/loader.gif' style='margin-top:10px; margin-bottom:10px; border:1px solid #808080'>";
  ajax("blocks/photo_block.php?ajax_pa="+pa+"&t="+currentTime.getTime(),"main_body_photo");
}