function checkEmail(str) 
{
var strFilter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;

if (strFilter.test(str))
{ return true; }
else
{ return false; }
}

function validateEmails()
{

var email1 = document.forms["sub"].elements["uemail"].value;
var name = document.forms["sub"].elements["name"].value;
var address = document.forms["sub"].elements["address"].value;
var postcode = document.forms["sub"].elements["postcode"].value;
var telephone = document.forms["sub"].elements["telephone"].value;
var seccode = document.forms["sub"].elements["security_code"].value;



if (!name){
        alert('Please enter your name');
document.forms["sub"].elements["name"].focus();
        return false; }



else if(!checkEmail(email1))

{ alert("Please enter a valid email address"); 
document.forms["sub"].elements["uemail"].focus();
return false;
}


else if (!address){
        alert('Please enter your address');
document.forms["sub"].elements["address"].focus();
        return false; }

else if (!postcode){
        alert('Please enter your postcode or zip');
document.forms["sub"].elements["postcode"].focus();
        return false; }

else if (!telephone){
        alert('Please enter your telephone number so we can contact you if there is a problem');
document.forms["sub"].elements["telephone"].focus();
        return false; }


else if (seccode.length !== 5){
        alert('Please enter a valid security code - five characters');
document.forms["sub"].elements["security_code"].focus();
        return false; }






else{
        return true;


}










} 


//-->