function validate()
{
	var visitor = document.forms[0].visitor
	var email = document.forms[0].visitormail
	var subject = document.forms[0].subject
	var notes = document.forms[0].notes
	
	if(visitor.value.length == 0)
	{
		alert('Please fill in your name');
		visitor.focus();
		return false;
	}
	if(email.value.length == 0)
	{
		alert('Please fill in your email address');
		email.focus();
		return false;
	}
	if(echeck(email.value) != true)
	{
		alert('Please fill in a valid email address');
		email.focus();
		return false;
	}
	if(subject.value.length == 0)
	{
		alert('Please fill in a subject for the message');
		subject.focus();
		return false;
	}
	if(notes.value.length == 0)
	{
		alert('Please fill in your message');
		notes.focus();
		return false;
	}
	return true;
}

function echeck(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;
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   return false;
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    return false;
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    return false;
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    return false;
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    return false;
		 }
		
		 if (str.indexOf(" ")!=-1){
		    return false;
		 }

 		 return true;				
	}