firstReal=4;	// first visible field in form
		// in radio buttons, only the last button needs an ID
		
function submitForm(){
	errorList = new Array;
	allFields = document.forms[0].length;
	for (x=firstReal; x<allFields; x++){
		if (document.forms[0][x].type=='radio') {	// if it's a radio button, check all fields with same name
			radioName = document.forms[0][x].name;
			unSelected = true;
			while(radioName == document.forms[0][x].name){
				if (document.forms[0][x].checked==true) unSelected = false;
				x += 1;
				}
			x -= 1;
			if (unSelected) errorList[errorList.length] = document.forms[0][x].id;
			}			
		else if (document.forms[0][x].value=='') errorList[errorList.length] = document.forms[0][x].id;
		}
	if (errorList.length==0) document.forms[0].submit();
	else {
		errorMsg = "Some fields need more information. If a   \nfield does not apply, enter zero or NA.\n\n";
		for (x=0; x<errorList.length; x++) errorMsg += "     -  " + errorList[x] + "\n";
		alert(errorMsg);
		}
	}
				






function readcookie (name) {
	var search = name + "=";
	if (document.cookie.length > 0) {
		offset = document.cookie.indexOf(search);
		if (offset != -1) {
			offset += search.length;
			end = document.cookie.indexOf(";", offset);
			if (end == -1) end = document.cookie.length;
			return (unescape(document.cookie.substring(offset, end)))}
		else return ("")}
	else return ("")}

// expiry is in days cookie will last

function writecookie (cookiename, cookievalue, expiry) {
	if (expiry > 0) {
		var expdate = new Date();
		expdate.setTime (expdate.getTime() + (expiry * 24 * 60 * 60 * 1000));
		expstring = '; expires=' + expdate.toGMTString() ;
		}
	else expstring = '';
	contents = cookiename + '=' + escape (cookievalue) + expstring + '; path=/';
	document.cookie = contents}
	
writecookie ('test','worked', 0);

if (readcookie ('test') == '')
	alert('You must enable cookies on your browser to proceed.');