function mysearch_gihou(){
   url = 'http://search.mhi.co.jp/?ref='+URLencode(location.href)+'&kw='+URLencode(document.search_form_gihou.kw.value)+'&ie='+document.search_form_gihou.ie.value+'&by=js&do0='+document.search_form_gihou.do0.value;
   //window.open(url);
   document.location.href=url;
   return false;
  }