function verisign_view() {
        open("https://seal.verisign.com/splash?form_file=fdf/splash.fdf&dn=WWW.HOUSING24.COM&lang=ko","","width=530,height=400");
    }

    function sub_menu_hide_layer(no, b_no) {
        if(document.layers) document.layers["sub_menu_layer"][no].visibility = 'hide';
        if(document.all) document.all["sub_menu_layer"][no].style.visibility = 'hidden';
        if(b_no) {
            if(document.layers) {
                var len = document.layers["sub_menu_layer"].length;
            }
            if(document.all) {
                var len = document.all["sub_menu_layer"].length;
            }
            if(b_no <= len - 1) {
                sub_menu_show_layer(b_no);
            }
        }
    }

    function sub_menu_show_layer(no) {
      sub_menu_layer_hidden();
      if(no) {
          if(document.layers) {
            document.layers["sub_menu_layer"][no].visibility = 'show';
          }
          if(document.all) {
            document.all["sub_menu_layer"][no].style.visibility = 'visible';
          }
      }
    }
    function sub_menu_layer_hidden() {
      if(document.layers) {
        for(i=0;i<document.layers["sub_menu_layer"].length;i++) {
            sub_menu_hide_layer(i);
        }
      }
      if(document.all) {
        for(i=0;i<document.all["sub_menu_layer"].length;i++) {
            sub_menu_hide_layer(i);
        }
      }
    }