function hideText(text, field, show)
{
  if (field.value == '' && show==1)
  {
    field.value = text;
  }
  if (field.value == text && show==0)
  {
    field.value = '';
  }
}

function lightOnBlock(block)
{
  block.className = 'index_news_block_active';
}
function lightOffBlock(block)
{
  block.className = 'index_news_block';
}

function lightOnBlockService(block)
{
  block.className = 'index_service_block_active';
}
function lightOffBlockService(block)
{
  block.className = 'index_service_block';
}


function lightNewsItemOn(block)
{
  block.className = 'news_item_td_active';
}
function lightNewsItemOff(block)
{
  block.className = 'news_item_td';
}



function lightHistoryItemOn(block)
{
  block.className = 'content_history_block_active';
}
function lightHistoryItemOff(block)
{
  block.className = 'content_history_block';
}



function showTab(num, total, name)
{
  for (var i=1; i<=total; i++)
  {
    document.getElementById(name+"_body_"+i).className = "tab_body";
    document.getElementById(name+"_link_"+i).className = "";
  }
  document.getElementById(name+"_body_"+num).className = "tab_body_active";
  document.getElementById(name+"_link_"+num).className = "active-2";
}