function baseImg(){
	btnImg = new Array(13);
	for(i=0;i<13;i++){
		btnImg[i] = new Array(2);
		for(j=0;j<2;j++){
			btnImg[i][j] = new Image();
		}
	}
	
	btnImg[0][0].src = "./img/btn/btn_greeting1.gif";
	btnImg[0][1].src = "./img/btn/btn_greeting2.gif";
	btnImg[1][0].src = "./img/btn/btn_about1.gif";
	btnImg[1][1].src = "./img/btn/btn_about2.gif";
	btnImg[2][0].src = "./img/btn/btn_stuff1.gif";
	btnImg[2][1].src = "./img/btn/btn_stuff2.gif";
	btnImg[3][0].src = "./img/btn/btn_info1.gif";
	btnImg[3][1].src = "./img/btn/btn_info2.gif";
	btnImg[4][0].src = "./img/btn/btn_pert1.gif";
	btnImg[4][1].src = "./img/btn/btn_pert2.gif";
	btnImg[5][0].src = "./img/btn/btn_medicine1.gif";
	btnImg[5][1].src = "./img/btn/btn_medicine2.gif";
	btnImg[6][0].src = "./img/btn/btn_topics1.gif";
	btnImg[6][1].src = "./img/btn/btn_topics2.gif";
	btnImg[7][0].src = "./img/btn/btn_column1.gif";
	btnImg[7][1].src = "./img/btn/btn_column2.gif";
	btnImg[8][0].src = "./img/btn/btn_access1.gif";
	btnImg[8][1].src = "./img/btn/btn_access2.gif";
	btnImg[9][0].src = "./img/btn/btn_link1.gif";
	btnImg[9][1].src = "./img/btn/btn_link2.gif";
	btnImg[10][0].src = "./common/img/btn_privacy1.gif";
	btnImg[10][1].src = "./common/img/btn_privacy2.gif";
	btnImg[11][0].src = "./common/img/btn_sitemap1.gif";
	btnImg[11][1].src = "./common/img/btn_sitemap2.gif";
	btnImg[12][0].src = "./common/img/btn_inquiry1.gif";
	btnImg[12][1].src = "./common/img/btn_inquiry2.gif";
}

function changeImg(num,img_num){
	eval("document.btn"+img_num).src = btnImg[img_num][num].src;
}

var msg = "6月より市の特定健診・特定保健指導が始まります。";
var scr_speed = 360;	//スクロール速度
function msgScroll(){
	document.getElementById("scroll-text").innerHTML = msg;
	msg = msg.substring(1,msg.length) + msg.substring(0,1);
	timerID = setTimeout("msgScroll()",scr_speed);
}