if(navigator.appVersion.charAt(0) >= "3") {
var img = new Array();

img[0] = new Image(); img[0].src  = "h_img/com.gif";
img[1] = new Image(); img[1].src  = "h_img/com_on.gif";
img[2] = new Image(); img[2].src  = "h_img/bus.gif";
img[3] = new Image(); img[3].src  = "h_img/bus_on.gif";
img[4] = new Image(); img[4].src  = "h_img/env.gif";
img[5] = new Image(); img[5].src  = "h_img/env_on.gif";
img[6] = new Image(); img[6].src  = "h_img/pro.gif";
img[7] = new Image(); img[7].src  = "h_img/pro_on.gif";
img[8] = new Image(); img[8].src  = "h_img/sup.gif";
img[9] = new Image(); img[9].src  = "h_img/sup_on.gif";
img[10] = new Image(); img[10].src  = "h_img/faq.gif";
img[11] = new Image(); img[11].src  = "h_img/faq_on.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;
}