function checkform(){

if (document.ask.marketing.value=='') {
rc=alert('Your feedback is important to us. Please choose an option which tells us how you found us.');
return false;
}
if (document.ask.name.value=='') {
rc=alert('Please state your name, address, post code and email address.');
return false;
}
if (document.ask.address.value=='') {
rc=alert('Your Address is required.');
return false;
}
if (document.ask.postcode.value=='') {
rc=alert('Your Post Code is required.');
return false;
}
if (document.ask.email.value.indexOf('@')==-1) {
rc=alert('Your E-mail Address is required.');
return false;
}
if (document.ask.message.value=='') {
rc=alert('Please include your question or comments');
return false;
}
if (document.ask.interests.value=='') {
rc=alert('Please state an area of interest');
return false;
}
return true;
}