function getid(obj) 
        { 
            return document.getElementById(obj); 
        } 
         
        function gettag(obj,tag,name) 
        { 
            var t = obj.getElementsByTagName(tag); 
            var list = new Array(); 
            for(i=0;i<t.length;i++) 
            { 
                if(t[i].getAttribute("name") == name ) 
                { 
                    list[list.length] = t[i]; 
                } 
            } 
            return list; 
        } 
         
        function changeFod(obj,info,name) 
        { 
            var p = obj.parentNode.getElementsByTagName("div"); 
            var f1 = getid(info); 
            var t = gettag(f1,"table",name); 
            for(i=0;i<p.length;i++) 
            { 
                if(p[i] == obj) 
                { 
                    p[i].className = "s"; 
                    t[i].className = "dis"; 
                } 
                else 
                { 
                    p[i].className = ""; 
                    t[i].className = "undis";                 
                } 
            } 
        }