function getCookie(){
	var name = "fontsize";
	var cookie = document.cookie; 
	if(-1 == cookie.indexOf(name)){ 
		var str2 = 'm';
	}
	else{
		var pos_s = cookie.indexOf(name)+name.length+1;
		var pos_e = cookie.indexOf(";",pos_s);
		if(-1 == pos_e){
			var str2 = cookie.slice(pos_s);
		}
		else{
			var str2 = cookie.slice(pos_s,pos_e);
		}
	}
	fontChange(str2);
}

function fontChange(str){
	var targetFile;
	var targetImg1 ="";
	var targetImg2 ="";
	var targetImg3 ="";
	switch(str){
		case "s":
			targetFile = "small";
			targetImg1 = "_rev";
			break;
		case "m":
			targetFile = "medium";
			targetImg2 = "_rev";
			break;
		case "l":
			targetFile = "large";
			targetImg3 = "_rev";
			break;
		default:
			targetFile = "medium";
			targetImg2 = "_rev";
			break;
	}
	document.getElementById("content").style.fontSize = targetFile;
	document.images["sizeImg1"].src = "http://yamagata-np.jp/img/font_change_s"+targetImg1+".gif";
	document.images["sizeImg2"].src = "http://yamagata-np.jp/img/font_change_m"+targetImg2+".gif";
	document.images["sizeImg3"].src = "http://yamagata-np.jp/img/font_change_l"+targetImg3+".gif";

	document.cookie = "fontsize="+str+";expires=Thu, 1-Jan-2030 00:00:00 GMT;path=/";
}