var shown='';

        var DOM = (document.getElementById) ? 1 : 0;
        var NS4 = (document.layers) ? 1 : 0;
        var IE = (document.all) ? 1 : 0;
        var IE4 = IE && !DOM;


        function get_obj(id){
            if(IE)return document.all[id];
            else
                if(DOM) return document.getElementById(id);
                else return null;
        }

        function show(name){
            if(shown!='') {
                hide();
            }
            var o=get_obj(name+'_gat');
            if(o!=null){
                o.style.left=500;
                o.style.top=document.body.scrollTop+100;
                o.style.display='block';
                shown=name+'_gat';
            }
        }

        function hide(){
            if(shown!=''){
                    var o=get_obj(shown);
                    o.style.display='none';
                shown='';
            }
        }


        function mopen(idmap){
             window.open('http://oskom.org/maps.php?id='+idmap,'map_idn');
        }