//calcualor
function get_number(a){
var old_val = document.getElementById('set_all_number').value;
var new_val = old_val+a
document.getElementById('set_all_number').value = new_val;
}
function all_number_calculate(){
var old_val = document.getElementById('set_all_number').value;
var new_val = eval(old_val);
document.getElementById('set_all_number').value = new_val;
}
function clear_all(){
document.getElementById('set_all_number').value = "";
}