function is_email(email_str) 
{
	var checkTLD=1;
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
	var emailPat=/^(.+)@(.+)$/;
	var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
	var validChars="\[^\\s" + specialChars + "\]";
	var quotedUser="(\"[^\"]*\")";
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	var atom=validChars + '+';
	var word="(" + atom + "|" + quotedUser + ")";
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
	var matchArray=email_str.match(emailPat);
	if (matchArray==null) return false;
	var user=matchArray[1];
	var domain=matchArray[2];
	for (i=0; i<user.length; i++)	if (user.charCodeAt(i)>127) 	return false;
	for (i=0; i<domain.length; i++)	if (domain.charCodeAt(i)>127)	return false;
	if (user.match(userPat)==null) 	return false;
	var IPArray=domain.match(ipDomainPat);

	if (IPArray!=null) 
	{
		for (var i=1;i<=4;i++)
			if (IPArray[i]>255) return false;
		return true;
	}

	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;

	for (i=0;i<len;i++) if (domArr[i].search(atomPat)==-1) return false;
	if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) return false;
	if (len<2) return false;

	return true;
} 

function check_faq(frm)
{
	if (frm.name.value=='')
	{
		alert('Введите Ваше имя !');
		frm.name.focus();
		return false;
	}

	if (frm.email.value=='')
	{
		alert('Введите адрес Вашей электронной почты !');
		frm.email.focus();
		return false;
	}

	if (!is_email(frm.email.value))
	{
		alert('Адрес электронной почты введен в неверном формате !');
		frm.email.focus();
		return false;
	}

	if (frm.msg.value=='')
	{
		alert('Введите Ваш вопрос !');
		frm.msg.focus();
		return false;
	}

	return true;
}

function show_img(filename, width, height)
{
	left_=screen.width/2-width/2;
	top_=screen.height/2-height/2-20;
	window.open(filename, 'NewImage', 'status=yes,menubar=no,toolbar=no,resizable=no,scrollbars=no, width='+width+', height='+height+', left='+left_+', top='+top_);
};

id_level_1='';
id_level_2='';

first_active_item_l0='';
first_active_item_l1='';

function change_level_1(id)
{
	sign_id='sign_'+id;
	table_id='table_'+id

	if ((id_level_1!='') && (id!=id_level_1))	//close id_level_2, because it's not id's table
	{
		document.getElementById('sign_'+id_level_1).src='/images/plus.gif';
		document.getElementById('table_'+id_level_1).style.display='none';
		document.getElementById('item_'+id_level_1).style.color='074289';
	}

	if (document.getElementById(sign_id).src.match(/minus\.gif/i))
		document.getElementById(sign_id).src='/images/plus.gif';
	else
		document.getElementById(sign_id).src='/images/minus.gif';

	if (document.getElementById(table_id).style.display=='')
	{
		document.getElementById(table_id).style.display='none';
	}
	else
	{
		document.getElementById(table_id).style.display='';
		document.getElementById('item_'+id).style.color='FF0000';
		id_level_1=id;
	}
}

function change_level_2(id)
{
	sign_id='sign_'+id;
	table_id='table_'+id

	if ((id_level_2!='') && (id!=id_level_2))	//close id_level_2, because it's not id's table
	{
		document.getElementById('sign_'+id_level_2).src='/images/plus.gif';
		document.getElementById('table_'+id_level_2).style.display='none';
		document.getElementById('item_'+id_level_2).style.color='074289';
	}

	if (document.getElementById(sign_id).src.match(/minus\.gif/i))
		document.getElementById(sign_id).src='/images/plus.gif';
	else
		document.getElementById(sign_id).src='/images/minus.gif';

	if (document.getElementById(table_id).style.display=='')
	{
		document.getElementById(table_id).style.display='none';
	}
	else
	{
		document.getElementById(table_id).style.display='';
		document.getElementById('item_'+id).style.color='FF0000';
		id_level_2=id;
	}
}

Nodes=new Array();