function login_init(){
	var anew, aexist, form;
	anew = document.getElementById("anew");
	aexist = document.getElementById("aexist");
	form = document.getElementById("form");
	anew.onclick = login_clicknew;
	aexist.onclick = login_clickexist;
	form.onsubmit = login_submit;
}
function login_clicknew(){
	login_changeVisitortype("newvisitor.shtml");
	return false;
}
function login_clickexist(){
	login_changeVisitortype("login.shtml");
	return false;
}
function login_submit(){
	var imgexist, schoolid, password, postcode;
	imgexist = document.getElementById("imgexist");
	schoolid = document.getElementById("schoolid");
	
	if ( !schoolid.value ){
		alert("Please provide School ID Number.");
		return false;
	}

	if ( imgexist.src.lastIndexOf("radiochecked.gif") != -1 ){
		password = document.getElementById("password");
		if ( !password.value ){
			alert("Please provide password.");
			return false;
		}
	}
	else{
		postcode = document.getElementById("postcode");
		if ( !postcode.value ){
			alert("Please provide Postal/Zip Code.");
			return false;
		}
		else{
			if ( isPostcode( postcode.value ) == false ){
				alert("Invalid Postal/Zip Code.");
				return false;
			}
		}
	}
	document.form.submit();
	return true;
}
function login_changeVisitortype(href){
	var isReturnning, s1, s2, s3, imgexist, imgnew;

	if ( href.lastIndexOf("newvisitor.shtml") == -1  )
		isReturnning = true;
	else
		isReturnning = false;

	s1 = document.getElementById("s1");
	s2 = document.getElementById("s2");
	s3 = document.getElementById("s3");
	imgexist = document.getElementById("imgexist");
	imgnew = document.getElementById("imgnew");
	if ( isReturnning == true ){
		s1.innerHTML = "Password:"
		s2.innerHTML = "<input type='password' id='password' name='password' value='' tabindex='10'>"
		s3.innerHTML = "<span id='forgot'>(<a href='forgot_password_e.shtml'>Find Password</a>)</span>"
		imgexist.src = "radiochecked.gif";
		imgnew.src = "radiounchecked.gif";
	}
	else{
		s1.innerHTML = "Postal/Zip Code:"
		s2.innerHTML = "<input type='text' id='postcode' name='postcode' value='' tabindex='10'>"
		s3.innerHTML = ""
		imgexist.src = "radiounchecked.gif";
		imgnew.src = "radiochecked.gif";
	}
}