function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function chg2(td_now){
                        downTd1.className=downTd2.className = downTd3.className =  downTd4.className = "xw_of";
                        td_now.className = "xw_on";
                }
                function MM_findObj2(n, d) { //v4.01
                  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
                    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
                  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
                  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj2(n,d.layers[i].document);
                  if(!x && d.getElementById) x=d.getElementById(n); return x;
                }
				function MM_showHideLayers() { //v6.0
                  var i,p,v,obj,args=MM_showHideLayers.arguments;
                  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj2(args[i]))!=null) { v=args[i+2];
                    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
                    obj.visibility=v; }
                }
				
//通知公告多层				
function chg3(td_now){
                        downTd13.className=downTd23.className = "tz_of";
                        td_now.className = "tz_on";
                }
                function MM_findObj3(n, d) { //v4.01
                  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
                    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
                  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
                  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj3(n,d.layers[i].document);
                  if(!x && d.getElementById) x=d.getElementById(n); return x;
                }
				function MM_showHideLayers() { //v6.0
                  var i,p,v,obj,args=MM_showHideLayers.arguments;
                  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj2(args[i]))!=null) { v=args[i+2];
                    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
                    obj.visibility=v; }
                }