// JavaScript Document
var btnObj = {
	font_btn01:{ size:"62%", ID:"font_btn01" },
	font_btn02:{ size:"75%", ID:"font_btn02" },
	font_btn03:{ size:"100%", ID:"font_btn03" }
};

function ExchangeStart(){
	var bObj = document.getElementById('font_btn01');
	if(bObj != null){
		ExchangeFontSize(bObj);
	}
}

function ExchangeFontSize(btn){
	for (var i in btnObj) {
		var bObj = document.getElementById(btnObj[i].ID);
		if(bObj != null){
			bObj.style.background = "#F5F5F5";
			bObj.style.color = "#000000";
		}
	}
	if(btnObj[btn.id] != null){
		document.body.style.fontSize=btnObj[btn.id].size;
		btn.style.background = "#FF4D00";
		btn.style.color = "#FFFFFF";	
	}
}