function checkform(){

    if (document.gen_enq.name.value=='') {
        rc=alert('Your Name is required.');
        return false;
    }
    if (document.gen_enq.postcode.value=='') {
        rc=alert('Your Post Code is required.');
        return false;

    }
    if (document.gen_enq.telephone.value=='') {
        rc=alert('Your Telephone No. is required.');
        return false;
    }
    if (document.gen_enq.email.value.indexOf('@')==-1) {
        rc=alert('Your E-mail is required.');
        return false;
    }
    if (document.gen_enq.enquiry.value=='') {
        rc=alert('Please enter your Comments or Enquiry.');
        return false;
    }
	    if (document.gen_enq.marketing2.value=='') {
        rc=alert('Your feedback is important to us. Please tell us where you heard about YVF.');
        return false;
    }

    return true;
}