var isDOM=document.getElementById;
var isOpera=isOpera5=window.opera && isDOM;
var isMSIE = document.all && document.all.item && !isOpera;
var isMozilla=isDOM && navigator.appName=="Netscape";
var display = (isMSIE) ? 'block' : 'table';
var form_data = new Array();

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
	var i,j=d.MM_p.length,a=MM_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];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function appendDataPrim(form,name,value)
{ 
	doc=form.ownerDocument; 
	e=doc.createElement('input');
	e.type="hidden"; 
	e.name=name;
	e.id='appended_'+name;
	e.value=value; 
	form.appendChild(e); 
} 

function checkbox(form_name,checkbox,name)
{
		var form = document.getElementById(form_name);
		var chb_field = form[name];
		var chb_im = document.getElementById(checkbox);
		
		if(chb_im.src.search(/01/g)!=-1)
		{
			chb_im.src = chb_im.src.replace(/01/g,'02');
			chb_field.disabled = false;
		}
		else
		{
			chb_im.src = chb_im.src.replace(/02/g,'01');
			chb_field.disabled = true;
		}
		return true;
}

function form2cookie(form_name)
{
	var form = document.getElementById(form_name);
	form_data[form_name] = new Array();
	for(var n=0; n<form.elements.length; n++)
	{
		form_data[form_name][n] = form.elements[n].value;
	}
	setCookie(form_name, form_data[form_name].toString(), 720);
}

function cookie2form(form_name)
{
	var form = document.getElementById(form_name);
	var form_string = getCookie(form_name);
	if(form_string != 'undefined' && form_string != '')
	{
		form_data[form_name] = form_string.split(",");
		for(var n=0; n<form_data[form_name].length; n++)
		{
			form.elements[n].value = form_data[form_name][n];
		}
		form.autologin.disabled = false;
		var chb_im = document.getElementById(form_name+'_chb');
		if(chb_im) chb_im.src = chb_im.src = chb_im.src.replace(/01/g,'02');
	}
}

function ins(name)
{
	var stat  = document.getElementById('stat_table');
	var forum = document.getElementById('forum_table');
	var chat  = document.getElementById('chat_table');
	switch (name)
	{
		case 'stat':
			stat.style.display = display;		
			if(forum) forum.style.display = 'none';
			if(chat)  chat.style.display = 'none';
		break;
		case 'forum':
			forum.style.display = display;
			if(stat) stat.style.display = 'none';
			if(chat) chat.style.display = 'none';		
		break;
		case 'chat':
			chat.style.display = display;		
			if(stat)  stat.style.display =  'none';
			if(forum) forum.style.display = 'none';		
		break;
	}
	setCookie('last_form',name,720);
}

function setCookie(cookieName, cookieContent, cookieExpireTime)
{
    if(cookieExpireTime>0)
	{
        var expDate=new Date();
        expDate.setTime(expDate.getTime()+cookieExpireTime*1000*60*60);
        var expires=expDate.toGMTString();
        document.cookie=cookieName+"="+escape(cookieContent)+"; path="+escape('/')+"; expires="+expires;
    } 
	else 
	{
        document.cookie=cookieName+"="+escape(cookieContent)+"; path="+escape('/')+"";
    }
}

function getCookie(cookieName)
{
    var ourCookie=document.cookie;
    if(!ourCookie || ourCookie=="" )return "";
    ourCookie=ourCookie.split(";");
    var i=0;
    var Cookie;
    while(i<ourCookie.length)
	{
        Cookie=ourCookie[i].split("=")[0];
        if(Cookie.charAt(0)==" ")
                Cookie=Cookie.substring(1);
        if(Cookie==cookieName)
		{
            return unescape(ourCookie[i].split("=")[1]);
        }
        i++;
    }
    return "";
}

function setFormData(id)
{
	var form_string = getCookie('last_form');
	if(form_string != 'undefined' && form_string != '' && form_string==id) ins(form_string);
}

function calendarBtn(obj)
{
	var calendar_btn = document.getElementById('calendar_btn');
	var btn_title = calendar_btn.title.split(' ');
	calendar_btn.title = obj.name=='f_month' 
		? obj[obj.selectedIndex].text+' '+btn_title[1]
		: btn_title[0]+' '+obj.value;
}



function CheckURL(url){
	re1 = /^(?:(s?https?|ftp|file|gopher|news|telnet|wais|mailto|notes):\/\/?)?(?:[\w-]+\.)+(?:com|net|org|mil|edu|arpa|gov|biz|info|aero|inc|name|[a-z]{2})(?:\/[a-z0-9.,_@%&?+=\~/-]*)?$/
	if (!re1.test(url)) {
	  alert("Ýòî íåôèãà íå ÓÐË!")
	  return false
	}
}