var ajax = new Array();
function getSubcategoryList(sel)
{
	var categoryCode = sel.options[sel.selectedIndex].value;
	document.getElementById('subcategory_name').options.length = 0;	// Empty city select box
    document.getElementById('subcategory_name').style.visibility = "hidden";
    document.getElementById('linename').style.visibility = "hidden";
	if(categoryCode.length>0){
		var index = ajax.length;
		ajax[index] = new sack();

		ajax[index].requestFile = 'getsubcategory.php?id='+categoryCode;	// Specifying which file to get
		ajax[index].onCompletion = function(){ createSubcategory(index) };	// Specify function that will be executed after file has been found
		ajax[index].runAJAX();		// Execute AJAX function
	}
}

function createSubcategory(index)
{
   document.getElementById('subcategory_name').style.visibility = "visible";
   document.getElementById('linename').style.visibility = "visible";
  	var obj = document.getElementById('subcategory_name');
 	eval(ajax[index].response);	// Executing the response from Ajax as Javascript code
}


var req;
var target;
var isIE;

function initRequest(url) {
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
        isIE = true;
        req = new ActiveXObject("Microsoft.XMLHTTP");
    }
}

function validateUserId() {
    if (!target) target = document.getElementById("userid");
    var url = "http://javanet1-staging.locaweb.com/ajax-validation/validate?id=1";
    initRequest(url);
    req.onreadystatechange = processRequest;
    req.open("GET", url, true);
    req.send(null);
}

function processRequest() {
    if (req.readyState == 4) {
        if (req.status == 200) {
            var message = req.responseXML.getElementsByTagName("valid")[0].childNodes[0].nodeValue;
            setMessageUsingDOM(message);
            var submitBtn = document.getElementById("submit_btn");
            if (message == "false") {
              submitBtn.disabled = true;
            } else {
              submitBtn.disabled = false;
            }
        }
    }
}

function setMessageUsingInline(message) {
    mdiv = document.getElementById("validator");
    if (message == "false") {
       mdiv.innerHTML = "<div style=\"color:red\">Invalid User Id</div>";
    } else {
       mdiv.innerHTML = "<div style=\"color:green\">Valid User Id</div>";
    }
}

 function setMessageUsingDOM(message) {
     var userMessageElement = document.getElementById("userIdMessage");
     var messageText;
     if (message == "false") {
         userMessageElement.style.color = "red";
         messageText = "Invalid User Id";
     } else {
         userMessageElement.style.color = "green";
         messageText = "Valid User Id";
     }
     var messageBody = document.createTextNode(messageText);
     // if the messageBody element has been created simple replace it otherwise
     // append the new element
     if (userMessageElement.childNodes[0]) {
         userMessageElement.replaceChild(messageBody, userMessageElement.childNodes[0]);
     } else {
         userMessageElement.appendChild(messageBody);
     }
 }

function disableSubmitBtn() {
    var submitBtn = document.getElementById("submit_btn");
    submitBtn.disabled = true;
}