var emailReg = "^[\\w-_\.]*[\\w-_\.]\@[\\w]\.+[\\w]+[a-zA-Z]$"

	var regex = new RegExp(emailReg);
//regex.test(_email) == false

function trim(stringToTrim) {
	return stringToTrim.replace(/^\s+|\s+$/g,"");
}

function validateContactForm(form) {
	var _subject = trim(form['subject'].value);
	var _message = trim(form['message'].value);
	var _email = trim(form['email'].value);
	
	
	if(_email.length==0) {
		alert("Enter your email address.");
		form.email.focus();
		return false;
	} else if(regex.test(_email) == false) {
		alert("Please provide a valid email address.");
		form.email.focus();
		return false;
	} else if(_subject.length==0) {
		alert("Enter yout subject.");
		form.subject.focus();
		return false;
	} else if(_message.length==0) {
		alert("Enter your message.");
		form.message.focus();
		return false;
	}
	
	return true;
}