var scripts = document.getElementsByTagName('script');
var myScript = scripts[ scripts.length - 1 ];

var queryString = myScript.src.replace(/^[^\?]+\??/,'');

var params = parseQuery( queryString );

function parseQuery ( query ) {
   var Params = new Object ();
   if ( ! query ) return Params; // return empty object
   var Pairs = query.split(/[;&]/);
   for ( var i = 0; i < Pairs.length; i++ ) {
      var KeyVal = Pairs[i].split('=');
      if ( ! KeyVal || KeyVal.length != 2 ) continue;
      var key = unescape( KeyVal[0] );
      var val = unescape( KeyVal[1] );
      val = val.replace(/\+/g, ' ');
      Params[key] = val;
   }
   return Params;
}

var src = params['u'] + '?';

for(var p in params) {
    if (p!='w' && p!='h') src += (p + '=' + params[p] + '&');
}

frm='<iframe src="' + src + '" width="' + params['w'] + '" height="' + params['h'] + '" AllowTransparency="True" scrolling="no" marginheight="0" marginwidth="0" frameborder="0"></iframe>';
document.write(frm);