BtnImg = new Array();
for(i=0; i<=21; i++){
BtnImg[i] = new Image();
}
BtnImg[0].src = "./mtop_img/mainmenu01.gif";
BtnImg[1].src = "./mtop_img/mainmenu01_2.gif";
BtnImg[2].src = "./mtop_img/mainmenu02.gif";
BtnImg[3].src = "./mtop_img/mainmenu02_2.gif";
BtnImg[4].src = "./mtop_img/mainmenu03.gif";
BtnImg[5].src = "./mtop_img/mainmenu03_2.gif";
BtnImg[6].src = "./mtop_img/mainmenu04.gif";
BtnImg[7].src = "./mtop_img/mainmenu04_2.gif";
BtnImg[8].src = "./mtop_img/mainmenu05.gif";
BtnImg[9].src = "./mtop_img/mainmenu05_2.gif";
BtnImg[10].src = "./mtop_img/mainmenu06.gif";
BtnImg[11].src = "./mtop_img/mainmenu06_2.gif";
BtnImg[12].src = "./mtop_img/mainmenu07.gif";
BtnImg[13].src = "./mtop_img/mainmenu07_2.gif";
BtnImg[14].src = "./mtop_img/mainmenu08.gif";
BtnImg[15].src = "./mtop_img/mainmenu08_2.gif";
BtnImg[16].src = "./mtop_img/mainmenu09.gif";
BtnImg[17].src = "./mtop_img/mainmenu09_2.gif";
BtnImg[18].src = "./mtop_img/mainmenu10.gif";
BtnImg[19].src = "./mtop_img/mainmenu10_2.gif";
BtnImg[20].src = "./mtop_img/mainmenu11.gif";
BtnImg[21].src = "./mtop_img/mainmenu11_2.gif";
BtnImg[22].src = "./mtop_img/menu01.gif";
BtnImg[23].src = "./mtop_img/menu01_2.gif";
BtnImg[24].src = "./mtop_img/menu02.gif";
BtnImg[25].src = "./mtop_img/menu02_2.gif";
BtnImg[26].src = "./mtop_img/menu03.gif";
BtnImg[27].src = "./mtop_img/menu03_2.gif";
BtnImg[28].src = "./mtop_img/menu04.gif";
BtnImg[29].src = "./mtop_img/menu04_2.gif";
BtnImg[30].src = "./mtop_img/menu05.gif";
BtnImg[31].src = "./mtop_img/menu05_2.gif";
BtnImg[32].src = "./mtop_img/menu06.gif";
BtnImg[33].src = "./mtop_img/menu06_2.gif";
BtnImg[34].src = "./mtop_img/menu07.gif";
BtnImg[35].src = "./mtop_img/menu07_2.gif";
BtnImg[36].src = "./mtop_img/menu08.gif";
BtnImg[37].src = "./mtop_img/menu08_2.gif";
BtnImg[38].src = "./mtop_img/menu09.gif";
BtnImg[39].src = "./mtop_img/menu09_2.gif";
function SwapImg(ImgName,Num){
	document.images[ImgName].src=BtnImg[Num].src;
	}