//toggles css display attribute -> shows/hides submenu
  function show(number){
    
    if(document.getElementById('submenu_' + number)) {
      var obj = document.getElementById('submenu_' + number);
      if(obj.style.display != 'block'){
        hideAll();
        obj.style.display = 'block'
      }
      else hideAll();
      return true;
    }
      
    
  }
  //sets all css display attributes to 'none' -> hides all submenus
  function hideAll(){
    for(i = 1; i <= 15; i++) {
      if(document.getElementById('submenu_' + i)) {
        document.getElementById('submenu_' + i).style.display = 'none';
      }
    }
    return true;
  }

function footer() {

	  var container = document.getElementById('main_container');
	  var left_zgoraj = document.getElementById('left_zgoraj');
	  
	  if(document.getElementById('main_table')) {
	  	var tabela = document.getElementById('main_table');
	  } else {
		var tabela = document.getElementById('container');
	  }
	  
	  var cheight = container.offsetHeight;
	  var lheight = left_zgoraj.offsetHeight + 50;
	  var theight = tabela.offsetHeight;
	  
	  var fheight = cheight - 80;
		
	  //alert (cheight);  
	  //alert (fheight);
	  //alert (lheight);  
	  //alert (theight);
	   
	  var razlika = (lheight - fheight);
	  
	  var pristej = razlika;
	  
	  //alert(razlika);

	  if (razlika > 0) {
		container.style.height = cheight + pristej + 'px';    
		tabela.style.height = cheight + pristej + 'px';    
	  }

}