ImageMenu1_off = new Image();
        ImageMenu1_off.src = "./images/mainmenus/aboutus_off.gif";
        ImageMenu1_on = new Image();
        ImageMenu1_on.src = "./images/mainmenus/aboutus_on.gif";

        ImageMenu2_off = new Image();
        ImageMenu2_off.src = "./images/mainmenus/investment_off.gif";
        ImageMenu2_on = new Image();
        ImageMenu2_on.src = "./images/mainmenus/investment_on.gif";

        ImageMenu3_off = new Image();
        ImageMenu3_off.src = "./images/mainmenus/product_off.gif";
        ImageMenu3_on = new Image();
        ImageMenu3_on.src = "./images/mainmenus/product_on.gif";

        ImageMenu4_off = new Image();
        ImageMenu4_off.src = "./images/mainmenus/subcom_off.gif";
        ImageMenu4_on = new Image();
        ImageMenu4_on.src = "./images/mainmenus/subcom_on.gif";

        ImageMenu5_off = new Image();
        ImageMenu5_off.src = "./images/mainmenus/rdc_on.gif";
        ImageMenu5_on = new Image();
        ImageMenu5_on.src = "./images/mainmenus/rdc_on.gif";

        ImageMenu11_off = new Image();
        ImageMenu11_off.src = "./images/menu5/yfnl_off.gif";
        ImageMenu11_on = new Image();
        ImageMenu11_on.src = "./images/menu5/yfnl_on.gif";

        ImageMenu12_off = new Image();
        ImageMenu12_off.src = "./images/menu5/zyxm_off.gif";
        ImageMenu12_on = new Image();
        ImageMenu12_on.src = "./images/menu5/zyxm_on.gif";

        ImageMenu13_off = new Image();
        ImageMenu13_off.src = "./images/menu5/hdrz_off.gif";
        ImageMenu13_on = new Image();
        ImageMenu13_on.src = "./images/menu5/hdrz_on.gif";

        onTime = null;
        onMenu = null;

        function showMenuOn(index)
        {
                if (onTime != null)
                {
                        clearTimeout(onTime);
                        hideMenuOff();
                }

                onMenu = 'ImageMenu' + index;
                document[onMenu].src = eval(onMenu + "_on.src");
        }
        function timer()
        {
                onTime = setTimeout("hideMenuOff()", 600);
        }
        function hideMenuOff()
        {
                document[onMenu].src = eval(onMenu + "_off.src");
        }