menuImgArr = new Array();
for(i=3;i<8;i++){
	menuImgArr[i] = new Image();
	menuImgArr[i].src = "../img/head_0" + i + "_.gif";
}

function chgImg(a){
	tar = document.images["head_0"+a];
	tar.src = "../img/head_0" + a + "_.gif";
}

function rtnImg(a){
	tar = document.images["head_0"+a];
	tar.src = "../img/head_0" + a + ".gif";
}