// サブウィンドウを開く
function map_a(url){ 
window.open(url, "map_a", "width=500,height=340,resizable=yes,scrollbars=yes,status=yes,toolbar=yes"); 
} 
function map_b(url){ 
window.open(url, "map_b", "width=500,height=340,resizable=yes,scrollbars=no,status=yes,toolbar=yes"); 
}