if(navigator.appVersion.charAt(0) >= 3) {
        var img = new Array();
        img[0] = new Image(); img[0].src = "img/common/head_menu01.gif";
        img[1] = new Image(); img[1].src = "img/common/head_menu02.gif";
		
        img[2] = new Image(); img[2].src = "img/common/head_menu03.gif";
        img[3] = new Image(); img[3].src = "img/common/head_menu04.gif";
		
        img[4] = new Image(); img[4].src = "img/common/head_menu05.gif";
        img[5] = new Image(); img[5].src = "img/common/head_menu06.gif";
		
        img[6] = new Image(); img[6].src = "img/common/head_menu07.gif";
        img[7] = new Image(); img[7].src = "img/common/head_menu08.gif";
		
        img[8] = new Image(); img[8].src = "img/common/head_menu09.gif";
        img[9] = new Image(); img[9].src = "img/common/head_menu10.gif";
		
        img[10] = new Image(); img[10].src = "img/common/head_menu11.gif";
        img[11] = new Image(); img[11].src = "img/common/head_menu12.gif";
		
        img[12] = new Image(); img[12].src = "img/common/head_menu13.gif";
        img[13] = new Image(); img[13].src = "img/common/head_menu14.gif";
		
        img[14] = new Image(); img[14].src = "img/top/top_menu01.gif";
        img[15] = new Image(); img[15].src = "img/top/top_menu02.gif";
		
        img[16] = new Image(); img[16].src = "img/top/top_menu03.gif";
        img[17] = new Image(); img[17].src = "img/top/top_menu04.gif";
		
        img[18] = new Image(); img[18].src = "img/top/top_menu05.gif";
        img[19] = new Image(); img[19].src = "img/top/top_menu06.gif";
		
        img[20] = new Image(); img[20].src = "img/top/top_menu07.gif";
        img[21] = new Image(); img[21].src = "img/top/top_menu08.gif";
		
        img[22] = new Image(); img[22].src = "img/top/top_menu09.gif";
        img[23] = new Image(); img[23].src = "img/top/top_menu10.gif";
		
		img[24] = new Image(); img[24].src = "img/common/main_menu01.gif";
        img[25] = new Image(); img[25].src = "img/common/main_menu02.gif";
		
        img[26] = new Image(); img[26].src = "img/common/main_menu03.gif";
        img[27] = new Image(); img[27].src = "img/common/main_menu04.gif";
		
        img[28] = new Image(); img[28].src = "img/common/main_menu05.gif";
        img[29] = new Image(); img[29].src = "img/common/main_menu06.gif";
		
        img[30] = new Image(); img[30].src = "img/common/main_menu07.gif";
        img[31] = new Image(); img[31].src = "img/common/main_menu08.gif";
		
        img[32] = new Image(); img[32].src = "img/common/main_menu09.gif";
        img[33] = new Image(); img[33].src = "img/common/main_menu10.gif";
		
        img[34] = new Image(); img[34].src = "img/tho/tho_btn01.gif";
        img[35] = new Image(); img[35].src = "img/tho/tho_btn02.gif";
		
        img[36] = new Image(); img[36].src = "img/common/head_menu15.gif";
        img[37] = new Image(); img[37].src = "img/common/head_menu16.gif";
}
function change_image(nam,num) {
        if(navigator.appVersion.charAt(0) >= 3) {
                document.images[nam].src = img[num].src;
        }
}

<!-- 2009-0805 ’ljÁ �«�« -->
var rtime=20000;
var image= new Array();
image[0]='img/top/top_pic003.gif';
image[1]='img/top/top_pic002.gif';
image[2]='img/top/top_pic001.gif';

function randimage(){
	x=Math.floor(Math.random() * image.length);
	banner.src=image[x];
	t=setTimeout('randimage()',rtime);
}
<!-- 2009-0805 ’ljÁ �ª�ª -->