function hide(id)
{
  var currentmenu = document.getElementById(id);
  if(currentmenu)
    currentmenu.style.visibility = 'hidden';
}

function show(id)
{
  var currentmenu = document.getElementById(id);
  if(currentmenu)
    currentmenu.style.visibility = 'visible';
}

function popup_img(url, title)
{
  var elenent_popup = document.getElementById('wrapper_popap');
  if (elenent_popup){
      jQuery('#wrapper_popap').remove();}

  html = '<div id="wrapper_popap" style="z-index:-100"><div class="popap"><div id="header_popap"><img alt="Marsel" src="images/img/logo_popap.jpg" width="147px" height="68px" /></div><div class="content_popap"><img src="'+url+'" alt="'+title+'" style="cursor:pointer;" onclick="jQuery(\'#wrapper_popap\').remove();" name="popupImg" onLoad="resizePopup();"/></div></div></div>'
  jQuery('body').append(html);
}

function resizePopup()
{
  img = document.images["popupImg"];
  jQuery('#wrapper_popap').css({'margin-top':-(img.height/2), 'margin-left':-(img.width/2)-37, 'z-index':1000});
}