/////////////////////////////////////////////////////////////////////
/////////////////////////// FORM FUNCTION ///////////////////////////
/////////////////////////////////////////////////////////////////////

	
function validation()
{
	if (document.Form.Name.value == ""){  // required name
	   	alert("Please enter your name.");
	   	document.Form.Name.focus();
	   	return (false);
  		}
	
	if (document.Form.Address.value == ""){  // required address
	   	alert("Please enter your address.");
	   	document.Form.Address.focus();
	   	return (false);
  		}
	
	if (document.Form.City.value == ""){  // required city
	   	alert("Please enter your city.");
	   	document.Form.City.focus();
	   	return (false);
  		}
		
	if (document.Form.State.value == ""){  // required state
	   	alert("Please enter your state.");
	   	document.Form.State.focus();
	   	return (false);
  		}
		
	if (document.Form.Zip.value == ""){  // required zip
	   	alert("Please enter your zip.");
	   	document.Form.Zip.focus();
	   	return (false);
  		}
		
	if (document.Form.Phone.value == ""){  // required phone
	   	alert("Please enter your phone.");
	   	document.Form.Phone.focus();
	   	return (false);
  		}

	if (document.Form.Email.value.length > 0) {
			return emailCheck(document.Form.Email.value);
		}
		
	return (true);
}

function emailCheck(emailStr) {
	var emailPat=/^(.+)@(.+)$/;
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]";
	var validChars="\[^\\s" + specialChars + "\]";
	var quotedUser="(\"[^\"]*\")";
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	var atom=validChars + '+';
	var word="(" + atom + "|" + quotedUser + ")";
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
	var matchArray=emailStr.match(emailPat);

	if (matchArray==null) {
		alert("Email address seems incorrect (check @ and .'s)");
		return false;
	}

	var user=matchArray[1];
	var domain=matchArray[2];

	if (user.match(userPat)==null) {
			alert("The username doesn't seem to be valid.");
		return false;
	}

	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				alert("Destination IP address is invalid!");
			return false;
			}
			}
			return true;
	}

	var domainArray=domain.match(domainPat);
	if (domainArray==null) {
		alert("The domain name doesn't seem to be valid.");
			return false;
	}

	var atomPat=new RegExp(atom,"g");
	var domArr=domain.match(atomPat);
	var len=domArr.length;
	if (domArr[domArr.length-1].length<2 || domArr[domArr.length-1].length>3) {
	   alert("The address must end in a three-letter domain, or two letter country.");
		return false;
	}

	if (len<2) {
		var errStr="This address is missing a hostname!";
		alert(errStr);
	return false;
	}

	return true;
}