function validate_email_form(){
	var names = document.contactform.names.value;
	var company = document.contactform.company.value;
	var title = document.contactform.title.value;
	var email = document.contactform["email"].value;
	var message = document.contactform.message.value;
	if (names == ""){
		alert("Please, enter your name.");
		return false;
	}
	if (company == ""){
		alert("Please, enter the name of your company.");
		return false;
	}
	if (email == ""){
		alert("Please enter your e-mail address.");
		return false;
	}
		if (email.search(/^[a-zA-Z0-9_-]+\.?[a-zA-Z0-9_-]*@[a-zA-Z0-9_-]+(\.[a-zA-Z]{1,}){1,}$/) !=0 && email.length>0){
		alert("Please, enter a valid e-mail address.");
		return false;
	}
	if (title == ""){
		alert("Please, enter the subject of your message.");
		return false;
	}		
	if (message == ""){
		alert("You did not type any message.");
		return false;
	}
return true;
}