function topMenu(elem)
{	
	var className = elem.className;
	if (className.indexOf('_checked') > -1) return;
	if(className.indexOf('_hover') > -1) elem.className = className.replace('_hover', '');
	else elem.className += '_hover';	
//	cropImageSrc(elem, (className.indexOf('_hover')  > -1 ? 1 : 0));
}

/*function cropImageSrc(elem, variant)
{
	alert('jh');
	img = elem.childNodes[0];
	if (img.nodeName == 'A') img = img.childNodes[0];
	src = img.src;
	count_src = src.lastIndexOf(".");
	if (variant == 0) new_src = src.substr(0, count_src)+"_hover.gif";
	else new_src = src.substr(0, count_src-6)+".gif";
	img.src = new_src;
}*/

function rightMenu(elem)
{	
	var div = elem.parentNode;
	if (div.className =='item_active') return;
	if (div.className == 'item') div.className = 'item_hover';
	else div.className = 'item';
}

function checkSubscribeForm(){
	var name = getElem('name');
	var email = getElem('email');
	if (!trim(name.value)) {
		alert('Вы не ввели ваше имя');
		return false;
	}
	if (!trim(email.value)){
		alert('Вы не ввели E-mail');
		return false;
	}
	if (!checkEmail(email.value)){
		alert('Введенный E-mail некорректен');
		return false;
	}
}

function Show(fname, width, height) {
	if (screen.height<=550 && screen.width<=700) { 
		document.location = fname;
	} else {
		if(!height) height = 800;
		if(!width) width = 600;		
		newHeight = height + 20;
		PopupWin = window.open(fname, "_blank", "height="+newHeight+",width="+width+",menubar=no,status=no,titlebar=no,toolbar=no,location=no,resizable=no,scrollbars=yes"); }
	return false;
}

function checkStrSearch(str) {
   if((str.length) < 3) {
        alert('Строка поиска должна быть не менее 3 символов');
        return false;
    } else return true;
}
function trim(str) {
	while (str.substr(0, 1) == ' ') {str = str.substr(1);};
	while (str.substr(str.length - 1, 1) == ' ') {str = str.substr(0, str.length - 1);};
	return str;
};

function checkForm() {
	input = document.getElementById('str');
	input.value = trim(input.value);

	if(input.value == default_value) input.value = ''; 
	fill = checkStrSearch(input.value);
	if(!fill && input.value == '') {
		input.value = default_value;
		return false;
	} else if(input.value != '' && !fill) return false;

};

function isInt(num, chara)
{
	if(((num >= 48) && (num <= 57)) || num == 37 || num == 8)
	{
		event.keyCode = num;
		return event.keyCode;
	}
	if(((chara >= 48) && (chara <= 57)) || chara == 37 || chara == 8)
	{
		event.charCode = chara;
		return event.charCode;
	}
	else
	{
		return false;
	}
}

function checkFeedbackForm() {
	var required = {
		"contact_name"		:	"Вы не ввели Ваше ФИО",
		"contact_email"		:	"Не введен или введен некорректный e-mail",
		"msg"				:	"Вы не ввели сообщение"
	};
	for (var i in required) {
		var el = document.getElementById(i);
		if(el.id == 'contact_email' && el.value && !checkEmail(el.value))
		{
			alert(required['contact_email']);
			el.focus();
			return false;
		};
		if (!el.value) {
			alert(required[i]);
			el.focus();
			return false;
		}
	}
	return true;
}

function preloadImg(src) {
	if (document.images) {
		var image = new Image();
		image.src = src;
		images.push(image);
	}
}

function auto_form_check(required) {
	if(!required) return true;
	for (var i in required) {
		var el = document.getElementById(i);
		if (!el.value) {
			alert(required[i]);
			el.focus();
			return false;
		}
	}
	return true;
}

function checkEmail(email) {
	if(!email) return email;
	if(!email.match(/^[\w\.\-]+@[\w\.\-]+\.[a-zA-Z]{2,}$/i, "")) return false;
	return true;
}

function showHiddenElem(id) {
	if(!document.getElementById(id)) {
		return false;
	}
	elem = document.getElementById(id);
	if(elem.style.display == 'block') elem.style.display = 'none';
	else elem.style.display = 'block';
}

function getElem(id) {
	return document.getElementById(id);
}

function preloadImages() {
	var d = document; 
	
	if(d.images) {
		var i, a = preloadImages.arguments;
		for(i = 0; i < a.length-1; i++) {
			d.preloadedImages[a[i]] = new Image;
			d.preloadedImages[a[i]].src = a[i];
		}
	}
}

function changeImg(img_name, image) {
	if (image.className == 'std')
	{
		image.src = site_url+'buttons/'+img_name+'_hover.gif';
		image.height = 81;
		image.className = '';
	}
	else
	{
		image.src = site_url+'buttons/'+img_name+'.gif';
		image.height = 65;
		image.className = 'std';
	}
}

function dump(elem) {
	var str="";
	for(var key in elem) {
		str += key + ": " + elem[key] + "\n<br>";
	}
	document.write(str);
}

function auto_maximize_width_height(id)
{
	var out = "";
	var item = "";
	var maxheight = 0;
	var maxwidth = 0;

	div = document.getElementById(id);
	childs = div.childNodes;
	for(key in childs) {
		item = childs[key];
		div_childs = item.childNodes;
		for(keys in div_childs) {
			items = div_childs[keys];
			if(items.className == 'txt')
			{
				if(items.offsetHeight > maxheight) {
					maxheight = items.offsetHeight;
				}
			}
		}
	}
	for(key in childs) {
		item = childs[key];
		div_childs = item.childNodes;
		for(keys in div_childs) {
			items = div_childs[keys];
			if ((items.nodeName != 'DIV') || (items.className != 'txt')) continue;
			items.style.height = maxheight+1+'px';
		}
	}
}