// JavaScript Document
function getXMLHTTPRequest() {
	try {
		req = new XMLHttpRequest();
		}
	catch(err1) {
		try {
			req = new ActiveXObject("Msxml2.XMLHTTP");
			}
		catch(err2) {
			try {
				req = new ActiveXObject("MicrosoftXMLHTTP");
				}
			catch(err3) {
				req = false;
				}
			}
		}
	return req;
	}

var http = getXMLHTTPRequest();
var msg1 = "Please enter your name";
var msg2 = "Please enter your email address";
var msg3 = "Please write your message here";

function validateEmail() {
	var name = document.emailForm.name.value;
	var email = document.emailForm.email.value;
	var subject = document.emailForm.subject.value;
	var message = document.emailForm.message.value;
	var url = "email.php";
	var myRandom = parseInt(Math.random()*99999999);
	var valid=true;

//check validity on submit

	if (name==msg1 || name==""){
	document.emailForm.name.value=msg1;
	document.emailForm.name.className="formtextRed";
	valid=false;
	}
	if (email==msg2 || email==""){
	document.emailForm.email.value=msg2;
	document.emailForm.email.className="formtextRed";
	valid=false;
	}
	if (message==msg3 || message==""){
	document.emailForm.message.value=msg3;
	document.emailForm.message.className="formtextRed";
	valid=false;
	}
	if (!valid) {return;}
	
//--------------------------------------

	http.open("POST", url +"?name=" + name + "&email=" + email + "&subject=" + subject  + "&message=" + message + "&rand=" + myRandom, true);
	http.onreadystatechange = validationResponse;
	http.send(null);
}

function validationResponse() {
	if (http.readyState!=4) { return; }
	if (http.status!=200) { alert("An error has occured" + http.statusText); return;}
	var serverResponse = http.responseText;
	document.getElementById('tinc_content').innerHTML = "<h1>" + serverResponse +"</h1>";
}

// swap form fields to help with completing the form 

function swapValue(currentId) {
	if (document.getElementById(currentId).value == msg1 || document.getElementById(currentId).value == msg2 || document.getElementById(currentId).value == msg3) {
	document.getElementById(currentId).value = "";
		if (document.getElementById(currentId).className = "formtextRed") {
			document.getElementById(currentId).className = "formtext";
		}
	}
}

function restoreValue(currentId) {
	if (document.getElementById(currentId).value == "") {
		if (currentId=='name' || currentId=='email' || currentId=='message'){
			document.getElementById(currentId).className = "formtextRed";
		if (currentId == 'name') {
			document.getElementById(currentId).value = msg1;
			}
			else if (currentId == 'email') {
			document.getElementById(currentId).value = msg2;
			}
			else if (currentId == 'message') {
			document.getElementById(currentId).value = msg3;
			}
		}
	}
}