Convert a Tell-A-Friend Script completely into BB Code

 <!-- Begin
    var initialsubj="Hay buddy, take a look at this"
    var initialmsg="Hi:n You may want to check out this site: "+window.location
    var good;
    function checkEmailAddress(field) {
    var goodEmail = field.value.match(/b(^(S+@).+((.com)|(.net)|(.edu)|(.mil)|(.gov)|(.org)|(.info)|(.sex)|(.biz)|(.aero)|(.coop)|(.museum)|(.name)|(.pro)|(..{2,2}))$)b/gi);
    if (goodEmail) {
    good = true;
    }
    else {
    alert('Please enter a valid address.');
    field.focus();
    field.select();
    good = false;
    }
    }
    u = window.location;
    function mailThisUrl() {
    good = false
    checkEmailAddress(document.eMailer.email);
    if (good) {
    http://window.location = "mailto:"+document.eMailer.email.value+"?subject="+initialsubj+"&body="+document.title+" "+u;
    window.location = "mailto:"+document.eMailer.email.value+"?subject="+initialsubj+"&body="+initialmsg
    }
    }
    //  End -->
    </script>
    <form name="eMailer">
    Tell a friend:
    <input type="text" name="email" size="26" value="    Enter Address Here" onFocus="this.value=''" onMouseOver="window.status='Enter email address here and tell a friend about this site...'; return true" onMouseOut="window.status='';return true">
    <br />
    <input type="button" value="Send this URL" onMouseOver="window.status='Click to send an email (with this page address) to a friend! Enter email address above...'; return true" onMouseOut="window.status='';return true" onClick="mailThisUrl();">
    </form>