function toggle(showHideDiv, switchImgTag) {
        var ele = document.getElementById(showHideDiv);
        var imageEle = document.getElementById(switchImgTag);
        if(ele.style.display == "block") {
                ele.style.display = "none";
		imageEle.innerHTML = '<img src="/includes/css/images/sub_show.gif" alt="show submenu" title="show submenu"> show submenu';
        }
        else {
                ele.style.display = "block";
                imageEle.innerHTML = '<img src="/includes/css/images/sub_hide.gif" alt="hide submenu" title="hide submenu"> hide submenu';
        }
}