function doNav ( selectNode ) {
   var href = selectNode.options[selectNode.selectedIndex].value;
   if ( /^[a-z]+:\/\//.test ( href ) ) {
      if ( href.indexOf('atproductions')>0) {
      	location.href=href;
      } else {
	      window.open ( href );
	  }
   } else {
      location.href=href;
   }
}