// JavaScript Document
function bgImg(){
var backgroundImage = document.getElementById("bg_img");
	if (screen.height>=900){
		backgroundImage.height = screen.height;
	}
	else {
		backgroundImage.height = 900;
	}
}
function changePhone(){
var phone1 = document.getElementById('phone1').value;
var phone2 = document.getElementById('phone2').value;
document.getElementById('bestNum1').innerHTML=phone1;
document.getElementById('best_num1').value=phone1;
document.getElementById('bestNum2').innerHTML=phone2;
document.getElementById('best_num2').value=phone2;
}
function checkAll(checkname, exby) {
  for (i = 0; i < checkname.length; i++)
  checkname[i].checked = exby.checked? true:false
}