if(navigator.appVersion.charAt(0) >=3) {
var img = new Array();
img[01] = new Image();  img[01].src = "images/ico_m01.gif";

img[11] = new Image();  img[11].src = "images/ico_m02.gif";

}

function _in(nam,num) {
if(navigator.appVersion.charAt(0) >=3) {
 document.images[nam].src = img[num].src;
 }
}

function _out(nam,num) {
 document.images[nam].src = img[num].src;
 }