//画像のプリロード
if (document.images){
	var button=new Array();
	button[0]=new Image();button[0].src="../image/menu_sub_00.jpg";
	button[1]=new Image();button[1].src="../image/menu_sub_00_over.jpg";
	button[2]=new Image();button[2].src="../image/menu_01.gif";
	button[3]=new Image();button[3].src="../image/menu_01_over.gif";
	button[4]=new Image();button[4].src="../image/menu_02.gif";
	button[5]=new Image();button[5].src="../image/menu_02_over.gif";
	button[6]=new Image();button[6].src="../image/menu_03.gif";
	button[7]=new Image();button[7].src="../image/menu_03_over.gif";
	button[8]=new Image();button[8].src="../image/menu_04.gif";
	button[9]=new Image();button[9].src="../image/menu_04_over.gif";
	button[10]=new Image();button[10].src="../image/menu_05.gif";
	button[11]=new Image();button[11].src="../image/menu_05_over.gif";
	button[12]=new Image();button[12].src="../image/menu_06.gif";
	button[13]=new Image();button[13].src="../image/menu_06_over.gif";
	button[14]=new Image();button[14].src="../image/menu_07.gif";
	button[15]=new Image();button[15].src="../image/menu_07_over.gif";
	button[16]=new Image();button[16].src="../image/menu_08.gif";
	button[17]=new Image();button[17].src="../image/menu_08_over.gif";
	button[18]=new Image();button[18].src="../image/menu_09.gif";
	button[19]=new Image();button[19].src="../image/menu_09_over.gif";
	button[20]=new Image();button[20].src="../image/menu_10.gif";
	button[21]=new Image();button[21].src="../image/menu_10_over.gif";
	button[22]=new Image();button[22].src="../image/menu_11.gif";
	button[23]=new Image();button[23].src="../image/menu_11_over.gif";
	button[98]=new Image();button[98].src="../image/menu_E.gif";
	button[99]=new Image();button[99].src="../image/menu_E_over.gif";
}

//画像の切り替え
function change(name,number){
	if(document.images){
		if(button[number]){
			document.images[name].src=button[number].src;
		}
	else{
		document.images[name].src=number;
	}
	}
}