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 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 detail_click(form)
{
  cnt = 0;
  for(i = 0; i < form.elements.length; i++)
  {
    if(form.elements[i].type == "checkbox")
    {
      if(form.elements[i].checked == true)
      {
        cnt++;
      }
    }

    if(cnt >= 4)
    {
      alert('Please carry out a check by three.');
      return false;
    }
  }

  if(cnt == 0)
  {
    alert('Please attach a check.');
    return false;
  }
  else
  {
    form.action = 'detail_en.cfm';
    form.method = 'post';
    form.submit();
  }
}

function chkbox_click(form, chkbox_num)
{
  cnt = 0;
  for(i = 0; i < form.elements.length; i++)
  {
    if(form.elements[i].type == "checkbox")
    {
      if(form.elements[i].checked == true)
      {
        cnt++;
        if(cnt >= 4)
        {
          form.elements[chkbox_num - 1].checked = false;
          return false;
        }
      }
    }
  }
}

function chk_clear(form)
{
  cnt = 0;
  for(i = 0; i < form.elements.length; i++)
  {
    if(form.elements[i].type == "checkbox")
    {
      form.elements[i].checked = false;
    }
  }
}