function contactus() {
	var	errs = false;
	var alertMsg = "";


	if (document.contact_form.full_name.value== "" || document.contact_form.full_name.value==null) {
		alertMsg += " - Please, enter your name" + "\n";
		 errs = true;	
		}

	if (echeck(document.contact_form.email.value)==false) {
		alertMsg += " - Invalid email address" + "\n";
		 errs = true;
		}
		
		
	if (document.contact_form.message.value== "" || document.contact_form.message.value==null) {
		alertMsg += " - Please, enter your message" + "\n";
		 errs = true;	
		}		


	if (errs == true) {
		alert (alertMsg)
		return false;
	}  else {
		return true;
	}
	
}