Javascript email validate_form help please :)

Hey guys,

Having a little trouble validating an email address field in an existing form. I validated the other feilds so they are not left blank but cant figure the email one.

My form details are:
<form id=form name=form action=http://www.smudged.co.uk/ebay/apply.php method=post target=_blank onsubmit=”return validate_form ( );”>

Input box details are:
<input type=”text” name=”paypal” id=paypal style=”width:225px” size=”40″ />

Javascript code so far is:
<script type=”text/javascript”>
<!–
function validate_form ( )
{
valid = true;

if ( document.form.fullname.value == “” )
{
alert ( “Please enter your full name.” );
valid = false;
}

if ( document.form.addressa.value == “” )
{
alert ( “Please enter your Address Line 1.” );
valid = false;
}

if ( document.form.addressb.value == “” )
{
alert ( “Please enter your Address Line 2.” );
valid = false;
}

if ( document.form.city.value == “” )
{
alert ( “Please enter your City.” );
valid = false;
}

if ( document.form.postcode.value == “” )
{
alert ( “Please enter your Postcode.” );
valid = false;
}

if ( document.form.paypal.value == “” )
{
alert ( “Please enter your Paypal email address.” );
valid = false;
}

if ( document.form.phone.value == “” )
{
alert ( “Please enter your Phone number.” );
valid = false;
}

if ( document.form.size.selectedIndex == 0 )
{
alert ( “Please Select The T-Shirt Size Required.” );
valid = false;
}

if ( document.form.colour.selectedIndex == 0 )
{
alert ( “Please Select The T-Shirt Colour Required.” );
valid = false;
}

return valid;

}
//–>
</script>

It validates everything at the moment so that it cant be left empty but I would like it to do the email field properly.

The page its located on at the moment is [url]http://www.smudged.co.uk/ebay/new.php[/url]

Many thanks in advance.

Dean

Also in #JavaScript _↴