function updateSurvey(){
	var ans=0;
	if (document.getElementById('surveyanswer1').checked)
		ans=1;
	else if (document.getElementById('surveyanswer2').checked)
		ans=2;
	else if (document.getElementById('surveyanswer3').checked)
		ans=3;
	else if (document.getElementById('surveyanswer4').checked)
		ans=4;
	if (ans==0) {
		document.getElementById('surveyErrorMsg').innerHTML='<font class="copy"><font color="#ff0000">Please select an answer first.</font></font>';
		setTimeout("document.getElementById('surveyErrorMsg').innerHTML=''",5000);
		return false;
	}
	
	document.getElementById('surveySubmitBtn').innerHTML='';
	document.getElementById('surveyErrorMsg').innerHTML='<br><font class="copy"><font color="#006c52">Thank you for your input.</font></font>';	
	document.getElementById('surveyanswer1').disabled=true;
	document.getElementById('surveyanswer2').disabled=true;
	document.getElementById('surveyanswer3').disabled=true;
	document.getElementById('surveyanswer4').disabled=true;

	var url='/library/updateSurvey.php?type=1&a='+ans+'&z='+document.getElementById('z').value;
	updateFunction=3;	//show results when done
	ajaxCall(url);	
}

function showSurvey(){	
	var URL="/library/getinfo.php?type=1&id="+surveyID;
	updateFunction=1;	//which function to call to process
	ajaxCall(URL);		
}

function showSurveyResults(){
	//assumes data already retrieved on page load
	var URL="/library/getinfo.php?type=1&id="+surveyID;
	updateFunction=2;	//which function to call to process
	ajaxCall(URL);		
}