function checkForm()
{

if (contactForm.clientName.value == ""){ 
alert("Please provide a name")
contactForm.clientName.focus()
contactForm.clientName.select()
return false
}

if ((contactForm.clientTel.value == "")&&(contactForm.clientMail.value == "")){ 
alert("Please provide a method of contact")
contactForm.clientTel.focus()
contactForm.clientTel.select()
return false
}

enqVal = -1;

for (i=0; i<contactForm.clientEnquiry.length; i++){

if (contactForm.clientEnquiry[i].checked){
enqVal = i;
}

} 

if (enqVal == -1){
alert("Please indicate the nature of your enquiry")
return false
}

document.contactForm.submit();

return true
}