// check
function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=");
  if (c_start!=-1)
    {
    c_start=c_start + c_name.length+1;
    c_end=document.cookie.indexOf(";",c_start);
    if (c_end==-1) c_end=document.cookie.length;
    return unescape(document.cookie.substring(c_start,c_end));
    }
  }
return "";
}

var img_key = document.getElementById("img_key");
if( getCookie("AVIM_on_off") == 1 ) // off
{
	img_key.src = "images/vi.gif";
}else
{
	img_key.src = "images/en.gif";
}


function change_key()
{
	
    var img_key = document.getElementById("img_key");
        
    if( img_key.src.substring( img_key.src.length - 6, img_key.src.length ) == "vi.gif")
    {
        img_key.src = "images/en.gif";
        AVIMObj.setMethod( - 1 );
    }
    else
    {
        img_key.src = "images/vi.gif"; 
        AVIMObj.setMethod( 0 );   
    }    
}