function popup(param, popW, popH, status) {
        var w = 480, h = 340;
        if (document.all || document.layers) {
                w = screen.availWidth;
                h = screen.availHeight;
        }
        popW = popW || 640;
        popH = popH || 520;
        var leftPos = (w-popW)/2, topPos = (h-popH)/2;
        var status = status || ',resizable=yes,scrollbars=yes,status=0';
        var popupWin = window.open(param, "popup", 'width=' + popW + ',height=' + popH +
                ',top=' + topPos + ',left=' + leftPos + status);
        if (navigator.appName == 'Netscape') { popupWin.focus(); }
}

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;
}