// validate submission
function validateSubmission(){
	
	var name=$("name");
	var email=$("email");
	var subject=$("subject");
	var comments=$("comments");
	var emailform=$("emailform");
	
	//check if any of those values is ""
	if (name.value==""){
		alert("Your name cannot be left blank.");
		emailform.name.focus();
		return (false);
	}else if (email.value==""){
		alert("Your email cannot be left blank.");
		emailform.email.focus();
		return (false);
	}else if (subject.value==""){
		alert("Subject cannot be left blank.");
		emailform.subject.focus();
		return (false);
	}else if (comments.value==""){
		alert("Your message cannot be left blank.");
		emailform.comments.focus();
		return (false);
	}else{
		//if they are all filled in, run this
		re = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/
		
		if (re.test(emailform.email.value)){
			return true;
		}
		alert("Please enter a valid email address.");
		emailform.email.focus();
		emailform.email.select();
		return (false);
	}
}

window.onload=function(){
	var emailform=$("emailform");
	
	emailform.onsubmit=function() { 
		return validateSubmission();
	}
}