var preload_flag = true;
var img_plus, img_minus;
var m_num = 0;

function Sys(id) {
  return document.all ? document.all[id] : document.getElementById(id);
}

function LoadMenu(max_num, menu_num) {
  m_num = max_num;
  img_plus = new Image();
  img_plus.src = '/assets/images_main/button_plus.gif';
  img_minus = new Image();
  img_minus.src = '/assets/images_main/button_minus.gif';
  var i, submenu, ctrl_image;
  if (document.getElementById) {
    for (i = 0; i <= m_num ; i++) {
      submenu = document.getElementById('menu'+i);
      ctrl_image = document.getElementById('img'+i);
      if (!(submenu == "undefined" || submenu == null || ctrl_image == "undefined" || ctrl_image == null)) {
        if (submenu.id == "menu"+menu_num) {
          submenu.style.display = "block";
          ctrl_image.src = img_minus.src;
        } else {
          submenu.style.display = "none";
          ctrl_image.src = img_plus.src;
        }
      }
    }
    preload_flag = false;
  }
  return false;
}

function HideMenu()
{
  if (preload_flag) return false;
  var i, submenu, ctrl_image;
  for (i = 0; i <= m_num ; i++)
  {
    submenu = document.getElementById('menu'+i);
    ctrl_image = document.getElementById('img'+i);
    if (!(submenu == "undefined" || submenu == null || ctrl_image == "undefined" || ctrl_image == null))
    {
      submenu.style.display = 'none';
      ctrl_image.src = img_plus.src;
    }
  }
  return false;
}

function OpenMenu(menu_num)
{
  if (preload_flag) return false;
  var submenu = document.getElementById('menu'+menu_num);
  var ctrl_image = document.getElementById('img'+menu_num);
  if (!(submenu == "undefined" || submenu == null || ctrl_image == "undefined" || ctrl_image == null))
  {
    if (submenu.style.display == "block")
    {
      submenu.style.display = "none";
      ctrl_image.src = img_plus.src;
    }
    else
    {
      HideMenu();
      submenu.style.display = "block";
      ctrl_image.src = img_minus.src;
    }
  }
  return false;
}

var preloadFlag = false;

// Load backgrounf images for menu
function preloadImgs() {
  if (document.images) {
    imgList = new Array(2);
    imgList[0] = new Image();
    imgList[0].src = "http://localhost/oao-ni/images/coumntitle_bg.jpg";
    imgList[1] = new Image();
    imgList[1].src = "http://localhost/oao-ni/images/coumntitle_bg1.jpg";
    preloadFlag = true;
  }
}

// Change background image of the element
function changeImg(elm, imgNum) {
  if (preloadFlag && elm != "undefined") {
    if (imgList[imgNum] != "undefined") {
      elm.style.backgroundImage = "url('"+imgList[imgNum].src+"')";
/*
      if (imgNum == 0) {
        elm.style.backgroundColor = "#ffffff";
	  } else {
        elm.style.backgroundColor = "#000000";
	  }
	  elm.className = "butnStyle"+imgNum; 
*/
    }
  }
}

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_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_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 Ahtung() {
  if (parent.frames.length) document.location = "anti.htm";
}