function validate() {

if (document.contactus.first_name.value=="") {
window.alert("First Name can not be blank"); return false; }
if (document.contactus.last_name.value=="") {
window.alert("Last Name can not be blank"); return false; }
if (document.contactus.company.value=="") {
window.alert("Company can not be blank"); return false; }
if (document.contactus.address.value=="") {
window.alert("Address can not be blank"); return false; }
if (document.contactus.city.value=="") {
window.alert("City can not be blank"); return false; }
if (document.contactus.country.value=="") {
window.alert("Country can not be blank"); return false; }
if (document.contactus.val_numbers.value=="") {
window.alert("Please fill in the validation numbers"); return false; }
}