<!--

/*
Strip whitespace from the beginning and end of a string
Input  : a string
Output : the trimmed string
*/
function trim(str)
{
	return str.replace(/^\s+|\s+$/g,'');
}

/*
Validation of all fields in form
Output : true if all input are correct, false otherwise
*/
function checkForm() {
	var f = document.forms.namedItem("guestform");
	var gname = f.elements.namedItem("txtName");
	var gemail = f.elements.namedItem("txtEmail");
	var gmessage = f.elements.namedItem("mtxMessage");

	// if name is empty alert the visitor
	if(trim(gname.value) == '') {
		alert('Please enter your name/nick/signiture');
		gname.focus();
		return false;
	}
	// alert the visitor if message is empty
	if(trim(gmessage.value) == '') {
		alert('Please enter your message');
		gmessage.focus();
		return false;
	}
	return true;
}

//-->