function onClickSearchGo() {
      var idx = document.getElementById('searchOptionSelect').selectedIndex;
      var Nvalue = document.getElementById('searchOptionSelect').options[idx].value;
      var Nttvalue = document.getElementById('searchBox').value;
      if (Nttvalue != 'Search Harvard Business Review') {
      	var searchUrl = "/search/" + encodeURIComponent(encodeURIComponent(Nttvalue)) + "/";
      } else {
      	var searchUrl = "/search/";
      }
      if (Nvalue == '0') { // 0 = all articles, 1 = all products
	      window.location.href = "http://hbr.harvardbusiness.org" + searchUrl;
	  } else {
          var externalUrl = document.getElementById('searchExternalUrl').value;
	      window.location.href= externalUrl + searchUrl;
	  }
}

function onPressSearchGo(event)
{
	var isNN = (navigator.appName.indexOf("Netscape")!=-1);
	var OP = (navigator.appName.indexOf("Opera")!=-1);
	if(OP)isNN=true;
	var key;
	key = (isNN) ? event.which : event.keyCode;
	if (key==13){
		onClickSearchGo();
		return false;
  } else {
      	return true;
  		}
}