var xmlHttp

function checkEnter(e){ //e is event object passed from function invocation
var character//Code literal character code will be stored in this variable

if(e && e.which){ //if which property of event object is supported (NN4)
e = e
characterCode = e.which //character code is contained in NN4's which property
}
else{
e = event
characterCode = e.keyCode //character code is contained in IE's keyCode property
}

if(characterCode == 13){ //if generated character code is equal to ascii 13 (if enter key)
checkForm();
return false
}
else{
return true
}
}


function checkUser() {
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null) {
 		alert ("Browser does not support HTTP Request")
 		return
 	}

 	var user=document.getElementById('user').value;
 	//var isId=document.getElementById('isId').checked;
 	var isOnline=document.getElementById('isOnline').checked;
 	var isAvatar=document.getElementById('isAvatar').checked;

 	checkUserAction();

	var url="ans2.php"
	params="user="+user
	//if (isId) params=params+"&isId=1"
	//if (isOnline) params=params+"&isOnline=1"
	params=params+"&isOnline=1"
	//if (isAvatar) params=params+"&isAvatar=1"
	params=params+"&isAvatar=1"
	params=params+"&sid="+Math.random()
	xmlHttp.onreadystatechange=stateChanged
	xmlHttp.open("POST",url,true)
	xmlHttp.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
	xmlHttp.send(params);
}

function isArray(obj) {
   if (obj.constructor.toString().indexOf("Array") == -1)
      return false;
   else
      return true;
}




function GetXmlHttpObject() {
	var objXMLHttp=null
	if (window.XMLHttpRequest) {
 		objXMLHttp=new XMLHttpRequest()
 	}
	else if (window.ActiveXObject) {
 		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
 	}
	return objXMLHttp
}

function checkForm(){
  var user=document.getElementById('user').value;
// 	var isId=document.getElementById('isId').checked;
 	var isOnline=document.getElementById('isOnline').checked;
 	var isAvatar=document.getElementById('isAvatar').checked;

 	//if (user.length>=4 && user.length<=32 && (/*isId ||*/ isOnline || isAvatar)){
 	if (user.length>=4 && user.length<=32){
    checkUser();
  }
  else {
    if (user.length<4 || user.length>32) alert(arrLanguage['userMinMaxLength']);
    //else if(/*!isId &&*/ !isOnline && !isAvatar) alert ('You must select at least one option');
  }
}