function validateForm() {

if (document.contactform.name.value == "") {
alert('Please enter your name');
return false;
}

if (document.contactform.cname.value == "") {
alert('Please enter a company');
return false;
}

if (document.contactform.phone.value == "") {
alert('Please enter a phone number');
return false;
}

if (document.contactform.email.value == "") {
alert('Please enter a valid email address');
return false;
}

if ((document.contactform.email.value == "") || 
(document.contactform.email.value.indexOf('@') == -1) || 
(document.contactform.email.value.indexOf('.') == -1)) {
alert('Please enter a valid email address');
return false;
}

if (document.contactform.comments.value == "") {
alert('Please enter your request');
return false;
}

return true;
}//validateForm