//MENU‰æ‘œ•ÏŠ·
function chanSideMenu(ImgName,Switch){
    //alert(ImgName);
    //alert(Switch);
    if (Switch == "on") {
        ImgSrc = "images/" + ImgName + "_on.gif";
    } else {
        ImgSrc = "images/" + ImgName + ".gif";
    }
    document.images[ImgName].src = ImgSrc;

    var ImgName_Ary = new Array('sell','buy','environment')
    //alert(ImgSrc);
    for (i=0; i<ImgName_Ary.length; i++) {
        if (ImgName != ImgName_Ary[i]) {
            offImgName = ImgName_Ary[i];
            offImgSrc = "images/" + offImgName + ".gif";
            if (document.images[offImgName] != undefined) {
                document.images[offImgName].src = offImgSrc;
            }
        }
    }
}