/* SURVEY FORM VALIDATION CODE
--------------------------------------------------------- */

function validate_form(email_form) {
	// Get the required form data
	var course_name = email_form.course;
	var signature = email_form.signature;
	
	var error = "";
	
	// Check for a course name
	if (course_name.value == "0") {
		error += "Please select the course you took.<br/>";
		course_name.style.border = "solid 2px Red";
	}
	else {
		course_name.style.border = "solid 1px #aaa";
	}
	
	
	// Make sure if "share" is selected, we have a name as well
	if (email_form.share[0].checked) {
		if (signature.value.length < 3) {
			error += "Please enter your full name if you want your answers to be shared.<br/>";
			signature.style.border = "solid 2px Red";
		}
		else {
			signature.style.border = "solid 1px #aaa";
		}
	}
	
	
	// Submit the form
	if (error.length == 0) {
		email_form.submit();
	}
	
	// Display errors
	else {
		document.getElementById("error").style.display = "block";
		document.getElementById("error").innerHTML = error;
		return false;
	}
	
	return false;
}