function jvalidate()
{
var msg="";
emBox = document.getElementById('em').value;
emCheck = document.getElementById('join_em');
postCheck = document.getElementById('join_pm');
streetBox = document.getElementById('street').value;
suburbBox = document.getElementById('suburb').value;
cityBox = document.getElementById('city').value;
postcodeBox = document.getElementById('postcode').value;
fname = document.getElementById('fname').value;
sname = document.getElementById('sname').value;

if(emCheck.checked!=true && postCheck.checked!=true)
{
msg=msg+"Please select one of the subscription preferences.\n";
}

if(fname==""){msg=msg+"Please enter your firstname.\n";}
if(sname==""){msg=msg+"Please enter your surname.\n";}

if(emCheck.checked==true){
if(emBox=="")msg=msg+"Please enter a valid email address.\n";
}

if(postCheck.checked==true){
if(streetBox=="")msg = msg + "Please enter your street address.\n";
if(suburbBox=="")msg = msg + "Please enter your suburb.\n";
if(cityBox=="")msg = msg + "Please enter your city.\n";
if(postcodeBox=="")msg = msg + "Please enter your postcode.\n";
}

if(msg=="")
document.jj.submit();
else
alert("Please correct the following errors to continue:\n\n"+msg);
}