function getCookie( name ) {
var start = document.cookie.indexOf( name + "=" );
var len = start + name.length + 1;

if ( ( !start ) && ( name != document.cookie.substring( 0, name.length ) ) ) {
return null;
}
if ( start == -1 ) return null;

var end = document.cookie.indexOf( ';', len );
if ( end == -1 ) end = document.cookie.length;
return unescape( document.cookie.substring( len, end ) );
}

 
function setCookie( name, value, expires) {
var today = new Date();

today.setTime( today.getTime() );
if ( expires ) {
expires = expires * 1000 * 60 * 60 * 24;
}

var expires_date = new Date( today.getTime() + (expires) );

document.cookie = name+'='+escape( value ) +
( ( expires ) ? ';expires='+expires_date.toGMTString() : '' ); //expires.toGMTString()
}


function maybe_redirect() 
{
var limba = getCookie("limba");
var aux = window.location.href;
if ((limba==1) && (aux.search(/index.htm/)==-1))
         {
         window.location.href=('index.htm');
         } 
  else if ((limba==2) && (aux.search(/index.en.htm/)==-1))
         {
         window.location.href=('index.en.htm');
         }
  else if ((limba==3) && (aux.search(/index.ru.htm/)==-1))
         {
         window.location.href=('index.ru.htm');
         }

}



function change_lang(option)
{
if (option==1)
 {
 document.location.href="index.htm";
 setCookie("limba",1,365);
 } 
 else if (option==2)
 {
 document.location.href="index.en.htm";
 setCookie("limba",2,365);
 }
 else if (option==3)
 {
 document.location.href="index.ru.htm";
 setCookie("limba",3,365);
 }
}