// JavaScript Document
function img_swap(obj, img) {
	obj.src = img;
}

function get_age() {
	var nowDate = new Date();
	var nowYear = nowDate.getFullYear();
	nowMonthDate = (nowDate.getMonth() + 1) * 100 + nowDate.getDate();
	var nowAge = nowYear - 1948;
	if( nowMonthDate < 1115 ) 
		nowAge -= 1;
	document.getElementById("curr_age").innerHTML = nowAge;
}