btnArr  = new Array();
btnArr_ = new Array();

image_path = "../img/home/";

function LoadBtnImage(num, filename)
{
  if(filename)
  {
    filename_ = filename.replace(".", "_.");
  }
  else
  {
    filename  = num + "."  + "gif";
    filename_ = num + "_." + "gif";
  }
  
  if(document.images)
  {
    var tImg = new Image();
    tImg.src  = image_path + filename;

    var tImg_ = new Image();
    tImg_.src = image_path + filename_;

    btnArr [num] = tImg;
    btnArr_[num] = tImg_;
  }
}

function m_over(num, filename)
{
  if(btnArr[num] == null) LoadBtnImage(num, filename);

  eval("document.images['"+num+"'].src = btnArr_['"+num+"'].src;");
}

function m_out(num, filename)
{
  if(btnArr[num] == null) LoadBtnImage(num, filename);

  eval("document.images['"+num+"'].src = btnArr['"+num+"'].src;");
}