function show_thumb(value) {
	for (f = 1; f < 999; f++)
		{
		if (document.getElementById('med' + f))
			{document.getElementById('med' + f).style.display = "none";}
		else
			{break;}
		}

	document.getElementById('med' + value).style.display = "block";
}



function ins_num(e) {
var key = window.event ? e.keyCode : e.which;
var keychar = String.fromCharCode(key);

/* FF */
if (e == "[object KeyboardEvent]")
	{
	with (e.which)
		{
		if ( (key <= -1) || (key >= 1) && (key <= 7) || (key >= 9) && (key < 48) || (key > 57) )
			{return false;}
		}
	}

/* IE */
if (e == "[object]")
	{
	with (event)
		{
		if ( (key < 48) || (key > 57) )
			{returnValue = false;}
		}
	}
}



function ins_num_dot(e) {
var key = window.event ? e.keyCode : e.which;
var keychar = String.fromCharCode(key);

/* FF */
if (e == "[object KeyboardEvent]")
	{
	with (e.which)
		{
		if ( (key <= -1) || (key >= 1) && (key <= 7) || (key >= 9) && (key != 44) && (key != 46) && (key < 48) || (key > 57) )
			{return false;}
		}
	}

/* IE */
if (e == "[object]")
	{
	with (event)
		{
		if ( (key != 44) && (key != 46) && (key < 48) || (key > 57) )
			{returnValue = false;}
		}
	}
}


function change_lang(h, s) {
	document.getElementById(h).style.display = 'none';
	document.getElementById(s).style.display = 'block';
}


function char_count(value, max_chars) {
	document.getElementById("ch_c_" + value).value = (document.getElementById(value).value).length + '/' + max_chars;
}


function find_tags(stringTag){
	poleElementu = document.getElementsByTagName(stringTag);
	//alert("Počet nalezených elementů "+stringTag+"  "+poleElementu.length);

	for (foo = 0; foo < poleElementu.length; foo++)
		{
		id = poleElementu[foo].id;
		value = poleElementu[foo].value;

		if (id.substr(0, 5) == "ch_c_")
			{
			document.getElementById(id).value = (poleElementu[foo-1].value).length + '/' + value;
			}
		}
}


function show_form(value) {
	document.getElementById('link_' + value).style.display = 'none';
	document.getElementById('form_' + value).style.display = 'block';
}



function hide_form(value) {
	document.getElementById('link_' + value).style.display = 'block';
	document.getElementById('form_' + value).style.display = 'none';
}