function openext1(externalURL,replacewindow)

	{
	externalURL=escape(externalURL);
	var url = 'http://www.ntu.edu.sg/nr/publicportal/includes/ExternalPage.asp?URL=' + externalURL;
	var replace;

	if (replacewindow=='undefined')
	   replace='win';
	else
	   replace=replacewindow;

	scrWidth = window.screen.availWidth - 50;
	scrHeight = window.screen.availHeight - 100;
	scrLeft = 0;
	scrTop=0;
	var strFeatures = "scrollbars=yes,status=yes,toolbar=yes,menubar=yes,location=no,resizable=yes,left=" + scrLeft + ",top=" + scrTop + ",height=" +  scrHeight + ",width=" + scrWidth
	//url = url.toLowerCase() ;

	window.open(url, replace, strFeatures, 0);
	return;
	}

function selBrowse_onchange()
{
	if(document.frmSearch.selBrowse.options[document.frmSearch.selBrowse.selectedIndex].value==""){

		}
		else if(document.frmSearch.selBrowse.options[document.frmSearch.selBrowse.selectedIndex].value!=""){
			ret=window.open(document.frmSearch.selBrowse.options[document.frmSearch.selBrowse.selectedIndex].value)
			document.frmSearch.selBrowse.selectedIndex=0;
		}

}

function MM_callJS(jsStr) { //v2.0
  Browse_onchange;
}

function fnSubmit(){
	if(bfnValidate()){

		if(document.frmSearch.selSearch.options[document.frmSearch.selSearch.selectedIndex].value=="0"){
			ret=window.open('http://www.google.com/search?q=' +  escape(document.frmSearch.txtKeyword.value) + '&btnG=Google+Search');
		}
		else if(document.frmSearch.selSearch.options[document.frmSearch.selSearch.selectedIndex].value=="1"){
			ret=openext1('http://gemssearch.ntu.edu.sg/NTUNative/search.jsp?query=' + escape(document.frmSearch.txtKeyword.value) + '&SearchScope=NTU Websites')
		}
		 else if(document.frmSearch.selSearch.options[document.frmSearch.selSearch.selectedIndex].value=="2"){
			ret=window.open('https://wis.ntu.edu.sg/webexe88/owa/TDR_TELDIR.NAME_SEARCH?STAFF_NAME=' +  escape((document.frmSearch.txtKeyword.value).substr(0,40))  );
		}
	}
}

function bfnValidate(){
	if(trim(document.frmSearch.txtKeyword.value)==""){
		alert("Please enter search keyword");
		return false;
	}
	return true;
}
function trim(str)
{
   return str.replace(/^\s*|\s*$/g,"");
}