function validateForm() {
	if (document.email_us.email_name.value=="") {
		alert("Please enter your name.");
		return false;
	}
	if (document.email_us.email_company.value=="") {
		alert("Please enter your company.");
		return false;
	}
	if (document.email_us.email_from.value=="") {
		alert("Please enter your email address.");
		return false;
	}
	else {
		var eml=document.email_us.email_from;
		var AtSym=eml.value.indexOf('@');
		var Period=eml.value.lastIndexOf('.');
		var Space=eml.value.indexOf(' ');
		var Length=eml.value.length - 1;
		if ((AtSym < 1) ||  (Period <= AtSym+1) ||(Period == Length ) ||(Space  != -1)) {
				alert('Please enter a valid e-mail address.');
				return false;
				eml.focus();
		}
	}
	if (document.email_us.email_phone.value==0){
		alert("Please enter your phone number.");
		return false;
	}
	if (document.email_us.email_country.value==0){
		alert("Please enter your country.");
		return false;
	}
	if (document.email_us.email_subject.value==0){
		alert("Please enter your question type.");
		return false;
	}
	if (document.email_us.email_body.value==""){
		alert("Please enter your question.");
		return false;
	}
	return true;
}