var digits = "0123456789";
var tag = '<img style="float: left; padding-right: 10px;" src="images/err.gif" alt="Error."/>';
var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;

function isInteger(s)
{   var i;
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag)
{   var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++)
    {   
        // Check that current character isn't whitespace.
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function sendMsg() {
	var msg_name = document.getElementById("msg_name").value;
	var msg_email = document.getElementById("msg_email").value;
	var msg = document.getElementById("msg").value;

	//validate name
	if (msg_name.length < 2) {
		document.getElementById("msg_status").innerHTML = tag + 'Please enter a valid name.';
		document.getElementById("msg_status").style.display = "";
		return;
	}
	
	//validate email
	if (filter.test(msg_email)) {
		//alert('YES! Correct email address');
	} else {
		document.getElementById("msg_status").innerHTML = tag + 'Please enter a valid email address.';
		document.getElementById("msg_status").style.display = "";
		return;
	}
	
	//validate message
	if ((msg==null) || (msg=="")) {
		//alert("Please Enter your Phone Number")
		document.getElementById("msg_status").innerHTML = tag + 'Please enter a message to send.';
		document.getElementById("msg_status").style.display = "";
		return;
	} else {
		document.getElementById("msg_status").innerHTML = '<img style="float: left; padding-right: 10px;" src="images/load2.gif"/>Sending Message...';
		document.getElementById("msg_status").style.display = "";
	}
	
	//All is OK. Send the mail.
  	var url = "mail.php?id=1&name=" + msg_name + "&email=" + msg_email + "&msg=" + msg; 
	request.open("GET", url, true);
	request.onreadystatechange = updateMsg;
	request.send(null);
}

function updateMsg() {
	if (request.readyState == 4 && request.status == 200) {
		var response = request.responseText;
		if (response == 1) {
			document.getElementById("msg_status").innerHTML = '<br /><p class="block"><img style="float: left; padding-right: 10px;" src="images/ok.gif" alt="Sent."/> Your feedback has been sent. Thank you!</p>';
		} else if (response == 0) {
			document.getElementById("msg_status").innerHTML = '<img style="float: left; padding-right: 10px;" src="images/err.gif" alt="Err"/>There was an error. Please retry.';
		}
		document.getElementById("msg_status").style.display = "";
	}
}