function valida() {
	if (document.form_mail.name.value == '') {
		alert('Please inform your name!');
		document.form_mail.name.focus();
		return false;
	}
	
	else if (document.form_mail.email.value.search(/^\w+((-\w+)|(\.\w+))*\@\w+((\.|-)\w+)*\.\w+$/) == -1) {
		alert("Please inform your email correctly!");
		document.form_mail.email.focus();
		return false;
	}
	
	else if (document.form_mail.message.value == '') {
		alert('Please inform your message!');
		document.form_mail.message.focus();
		return false;
	}
}