// JavaScript Document

function validate_newsletter()
{
	if (document.newsletter_signup.fullname.value == null || document.newsletter_signup.fullname.value == '')
	{
		alert('Name field cannot be blank');
		return false;
	}
	
	else if (document.newsletter_signup.email.value == null || document.newsletter_signup.email.value == '')
	{
		alert('email field cannot be blank');
		return false;
	}
	
	else if (emailCheck(document.newsletter_signup.email.value) == false){
		alert("You did not enter a valid email address");
		document.newsletter_signup.email.value = "";
		document.newsletter_signup.email.focus();
		return false;
	}
	
	return true;
}

function emailCheck(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					
}