function showTab(id, hide_id){
    document.getElementById(hide_id).style.display = 'none';
    document.getElementById(id).style.display = '';
  }
  function checkAll(name) {
    var el = document.getElementsByTagName("input");
    for (i=0; i<el.length; i++) {
      if(el[i].getAttribute('type') == 'radio') {
        if(el[i].value == name) {
          el[i].checked = true;       
        } else {
          el[i].checked = false;               
        }
      }
    }
  }
  function modalWin() {
    if (window.showModalDialog) {
      window.showModalDialog('check_cart_modal.php','check_cart','dialogWidth:255px;dialogHeight:250px');
    } else {
      window.open('check_cart_modal.php','check_cart','height=255,width=250,toolbar=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no ,modal=yes');
    }
  }
  function submitCheckCart(modal) {
    if(modal == '1') {
      modalWin();
      return false;
    } else {
      return true;
    }
  }