var defaultMessage = "Type your message here...";

function checkMailForm() {
	if(document.getElementById('mailForm').From.value == "") {
		alert("You must give your name");
		document.getElementById('mailForm').From.focus();
		return false;
	}
	if(document.getElementById('mailForm').ReplyTo.value == "") {
		alert("You must give your email address");
		document.getElementById('mailForm').ReplyTo.focus();
		return false;
	}
	if(
		document.getElementById('mailForm').ReplyTo.value.indexOf('@')==-1 || 
		document.getElementById('mailForm').ReplyTo.value.substring(document.getElementById('mailForm').ReplyTo.value.indexOf('@')+1).indexOf('@')!=-1 || 
		document.getElementById('mailForm').ReplyTo.value.substring(document.getElementById('mailForm').ReplyTo.value.indexOf('@')+1).indexOf('.')==-1
	) {
		alert("The supplied email address is invalid");
		document.getElementById('mailForm').ReplyTo.focus();
		document.getElementById('mailForm').ReplyTo.select();
		return false;
	}
 	if (
 		document.getElementById('mailForm').Message.value == "" ||
 		document.getElementById('mailForm').Message.value == defaultMessage
 	) {
 		alert("You must give a message");
		document.getElementById('mailForm').Message.focus();
		document.getElementById('mailForm').Message.select();
 		return false;
 	}
	return true;
}