//ボタンロールオーバー

var hb1_on = new Image();
var hb1_off = new Image();
hb1_on.src = "base_imgs/head_b1_2.gif";
hb1_off.src = "base_imgs/head_b1.gif";
	
var hb2_on = new Image();
var hb2_off = new Image();
hb2_on.src = "base_imgs/head_b2_2.gif";
hb2_off.src = "base_imgs/head_b2.gif";

var hb3_on = new Image();
var hb3_off = new Image();
hb3_on.src = "base_imgs/head_b3_2.gif";
hb3_off.src = "base_imgs/head_b3.gif";

var hb4_on = new Image();
var hb4_off = new Image();
hb4_on.src = "base_imgs/head_b4_2.gif";
hb4_off.src = "base_imgs/head_b4.gif";

var hb5_on = new Image();
var hb5_off = new Image();
hb5_on.src = "base_imgs/head_b5_2.gif";
hb5_off.src = "base_imgs/head_b5.gif";

var hb6_on = new Image();
var hb6_off = new Image();
hb6_on.src = "base_imgs/head_b6_2.gif";
hb6_off.src = "base_imgs/head_b6.gif";

var hb7_on = new Image();
var hb7_off = new Image();
hb7_on.src = "base_imgs/head_b7_2.gif";
hb7_off.src = "base_imgs/head_b7.gif";

var hb8_on = new Image();
var hb8_off = new Image();
hb8_on.src = "base_imgs/head_b8_2.gif";
hb8_off.src = "base_imgs/head_b8.gif";

var hb9_on = new Image();
var hb9_off = new Image();
hb9_on.src = "base_imgs/head_b9_2.gif";
hb9_off.src = "base_imgs/head_b9.gif";

var hb10_on = new Image();
var hb10_off = new Image();
hb10_on.src = "base_imgs/head_b10_2.gif";
hb10_off.src = "base_imgs/head_b10.gif";

function rollon(targetimage) {
	if(targetimage == "hb1") {
		document.images [targetimage].src = hb1_on.src;
	} else if (targetimage == "hb2") {
		document.images [targetimage].src = hb2_on.src;
	} else if (targetimage == "hb3") {
		document.images [targetimage].src = hb3_on.src;
	} else if (targetimage == "hb4") {
		document.images [targetimage].src = hb4_on.src;
	} else if (targetimage == "hb5") {
		document.images [targetimage].src = hb5_on.src;
	} else if (targetimage == "hb6") {
		document.images [targetimage].src = hb6_on.src;
	} else if (targetimage == "hb7") {
		document.images [targetimage].src = hb7_on.src;
	} else if (targetimage == "hb8") {
		document.images [targetimage].src = hb8_on.src;
	} else if (targetimage == "hb9") {
		document.images [targetimage].src = hb9_on.src;
	} else if (targetimage == "hb10") {
		document.images [targetimage].src = hb10_on.src;
	}
}

function rolloff(targetimage) {
	if(targetimage == "hb1") {
		document.images [targetimage].src = hb1_off.src;
	} else if (targetimage == "hb2") {
		document.images [targetimage].src = hb2_off.src;
	} else if (targetimage == "hb3") {
		document.images [targetimage].src = hb3_off.src;
	} else if (targetimage == "hb4") {
		document.images [targetimage].src = hb4_off.src;
	} else if (targetimage == "hb5") {
		document.images [targetimage].src = hb5_off.src;
	} else if (targetimage == "hb6") {
		document.images [targetimage].src = hb6_off.src;
	} else if (targetimage == "hb7") {
		document.images [targetimage].src = hb7_off.src;
	} else if (targetimage == "hb8") {
		document.images [targetimage].src = hb8_off.src;
	} else if (targetimage == "hb9") {
		document.images [targetimage].src = hb9_off.src;
	} else if (targetimage == "hb10") {
		document.images [targetimage].src = hb10_off.src;
	}
}