function grade(type) {
	var num1 = eval("document.gradeForm." + type + "1").value;
	var	num2 = eval("document.gradeForm." + type + "2").value;
	var	result;

	if(num1 != "" && num2 != ""){
		result = num1 - num2;
		$("#"+type).text(result);
	}
}

function isNumeric(value){
	// Returns true if parameter is an number
	var checkstr = "0123456789.";

   for (i = 0; i < value.length; i++)
		if(checkstr.indexOf(value.substr(i,1)) < 0)
			return false;

	return true;
}

function validate(){
	var login = document.registerForm.login.value;
	var login2 = document.registerForm.login2.value;
	var password = document.registerForm.password.value;
	var password2 = document.registerForm.password2.value;
	var fName = document.registerForm.fName.value;
	var lName = document.registerForm.lName.value;
	var addr1 = document.registerForm.addr1.value;
	var city = document.registerForm.city.value;
	var state = document.registerForm.state.value;
	var zip = document.registerForm.zip.value;
	var country = document.registerForm.country.value;
	var horseName = document.registerForm.horseName.value;
	var horseAge = document.registerForm.horseAge.value;
	
	if(login.indexOf("@") >= 0 && login.indexOf(".") >= 0){
		if(login != login2){
			window.alert("E-mails do not match.  Please re-enter your e-mail addresses.");
			return false;
		}
	}
	else{
		window.alert("Please enter a valid E-mail address.");
		return false;
	}

	if(fName == ""){
		window.alert("Please enter your first name.");
		return false;
	}

	if(lName == ""){
		window.alert("Please enter your last name.");
		return false;
	}

	 if(password == ""){
		window.alert("Please enter your password.");
		return false;
	}

	 if(password != password2){
		window.alert("Passwords do not match.  Please re-enter your passwords.");
		return false;
	}

	if(addr1 == ""){
		window.alert("Please enter your address.");
		return false;
	}

	if(city == ""){
		window.alert("Please enter your city.");
		return false;
	}

	if(state == ""){
		window.alert("Please enter your state or province.");
		return false;
	}

	if(zip == ""){
		window.alert("Please enter your postal code.");
		return false;
	}

	if(country == ""){
		window.alert("Please enter your country.");
		return false;
	}

	if(horseName == ""){
		window.alert("Please enter your horse's name.");
		return false;
	}

	if(horseAge == "Select Age"){
		window.alert("Please choose an Age.");
		return false;
	}

	return true;
}

function validateResults() {
	
	if(document.gradeForm.lame1.value == "" || document.gradeForm.lame2.value == "" 
		|| document.gradeForm.pain1.value == "" || document.gradeForm.pain2.value == "" 
		|| document.gradeForm.heat1.value == "" || document.gradeForm.heat2.value == "" 
		|| document.gradeForm.joint1.value == "" || document.gradeForm.joint2.value == "" 
		|| document.gradeForm.overall1.value == "" || document.gradeForm.overall2.value == ""){
		window.alert("Please completly fill out the form before submitting.");
		return false;
	}

	return true;
}