function checkForm(that) {
	var errmsg = '';
	if (that.name.value.length < 1) {
		errmsg += '-> Enter your name\n';
	}
	if (that.email.value.length < 1) {
		errmsg += '-> Enter your e-mail address\n';
	}
	if (!isValidEmail(that.email.value)) {
		errmsg += '-> Enter a valid e-mail address\n';
	}
	if (that.comments.value.length < 1) {
		errmsg += '-> Enter a message\n';
	}
	if (errmsg > '') {
		alert('Oops...please go back and fix the following errors:\n\n'+errmsg);
		return false;
	} else {
		return true;
	}
}

function isValidEmail(address) {
	if (address != '' && address.search) {
		if (address.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1) {
	  	return true;
		} else {
			return false;
	  }
	} else {
		return true;
	}
}