function check_email(str) {
	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	if (str.indexOf(at)==-1){
	   return false
	} else if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
	   return false
	} else if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		return false
	} else if (str.indexOf(at,(lat+1))!=-1){
		return false
	} else if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		return false
	} else if (str.indexOf(dot,(lat+2))==-1){
		return false
	} else if (str.indexOf(" ")!=-1){
		return false
	}
	return true					
}


function check_submit() {
	if (document.getElementById('name').value=="" || document.getElementById('email').value=="" || document.getElementById('message').value=="" || document.getElementById('spam').value=="") {
		document.getElementById('submit').disabled=true;
	} else {
		document.getElementById('submit').disabled=false;
	}
}
function spam_check() {
	if (document.getElementById('spam').value!="") {
		if (document.getElementById('spam').value!="4") {
			document.getElementById('submit').disabled=true;
			alert("Well gee, this is embarrassing, but that's the wrong answer.\n\nPlease try again.");
		} else {
			document.getElementById('submit').disabled=false;
		}
	}
}
function validate_info() {
	if (!check_email(document.getElementById('email').value)) {
		alert("Please enter a valid email address");
		return false;
	}
}