function validate(f) {
	//return true;
	if(f.name.value == '') {
		alert('Please enter your name');
		f.name.focus();
		return false;
	}
	
	if(/^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/.test(f.email.value) == false) {
		alert('Please enter your valid email address');
		f.email.focus();
		return false;
	}
	
	if(f.message.value == '') {
		alert('Please enter you message');
		f.message.focus();
		return false;
	}
	
	return true;
}