/*IMAGE PRELOAD*/
function preloadImages() 
{ 
  	var d = document; 
  	if(d.images)
  	{ 
  		if(!d.MM_p) d.MM_p = new Array();
    	var i,j = d.MM_p.length, a = preloadImages.arguments; 
	
		for(i = 0; i < a.length; i++)
    		if (a[i].indexOf("#") != 0)
			{ 
				d.MM_p[j] = new Image; 
				d.MM_p[j++].src = a[i];
			}
	}
}
/*IMAGE PRELOAD*/

/*MENU CONTROL*/
var PocetMenu = 1;
function Show(CisMenu)    
{
  var menu = document.getElementById('submenu'+CisMenu);	
  menu.style.display="block";
}

function Hide() 
{
  var menu, i;
  for(i=1; i<=PocetMenu; i++) 
  {
      menu = document.getElementById('submenu'+i);	
      menu.style.display="none";
  }
}
/*MENU CONTROL*/

/* GUESTBOOK INPUT */
function showGBInput()
{
	document.getElementById('commentForm').style.display="block";
}

function hideGBInput()
{
	document.getElementById('commentForm').style.display="none";
}
/* GUESTBOOK INPUT */

/* KONTROLA */
function isValid(formField,fieldLabel)
{
	var result = true;
	if (formField.value == "")
	{
	  alert('Vyplňte ' + fieldLabel +'.');
	  formField.focus();
	  result = false;
	}
	return result;
}

function validateGBInput(theForm)
{
	if (!isValid(theForm.name,"Vaše jméno"))
	  return false;
	if (!isValid(theForm.text,"pole příspěvku"))
	  return false;
	if (!isValid(theForm.check,"odpověď na \nkontrolní otázku"))
	  return false;
	
	return true
}
/* KONTROLA */

/* ODESLANI KOMENTARE */
function submitGBform()
{
	if(document.gbInputForm.onsubmit())
		document.gbInputForm.submit();
}
/* ODESLANI KOMENTARE */