function showhide(obj, li) {
    var my_obj = "li";
    var myDiv = "me";

    for (var i = 1; i <= 3; i++) {
        var txt = myDiv + i;
        if (obj != null) {
            if (obj == txt) {
                if (document.getElementById(my_obj + i) != null) {
                    if (document.getElementById(my_obj + i).src = 'images/plus-icon.gif') {
                        document.getElementById(my_obj + i).src = "images/minus-icon.gif"
                        document.getElementById(myDiv + i).style["display"] = "block"
                    }
                }
            }
            else {
                if (document.getElementById(myDiv + i) != null) {
                    document.getElementById(myDiv + i).style["display"] = "none";
                    document.getElementById(my_obj + i).src = 'images/plus-icon.gif';
                }
            }
        }
    }
}