function checkAll(allbox) {
for (var i = 0; i < document.search["city[]"].length; i++) {
document.search["city[]"][i].checked = allbox.checked
}
}
function checkAll2(allbox) {
for (var i = 0; i < document.search["area[]"].length; i++) {
document.search["area[]"][i].checked = allbox.checked
}
}