function onChgAuth(url)
{
  var imgsrc = document.getElementById("imgauthcode");
  imgsrc.src = url+"?rnd=" + Math.random();
}
function document.onkeydown(){
    if (event.keyCode==13){
    	doLogin();
    }
}

function doLogin()
{
  if(!checkData()) return false;
  checkLoginType();
  document.getElementById("theform").submit();
}
function doEnterKey()
{
  if(event.keyCode == 13)
  {
    doLogin();
  }
}
function checkLoginType()
{
  var acct = document.getElementById("account").value;
  var emailRe = /\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/;
  if(emailRe.test(acct)) {
    document.getElementById("logintype").value = "email";
  } else {
    document.getElementById("logintype").value = "username";
  }
}
function checkData()
{
  var acct = document.getElementById("account").value;
  var pwd = document.getElementById("password").value;
  var auth = document.getElementById("userauthcode").value;

  if(acct.length < 1) {
    alert("请输入用户名!");
	document.getElementById("account").focus();
	return false;
  } else if(pwd.length < 1) {
    alert("请输入密码!");
	document.getElementById("password").focus();
	return false;
  } else if(auth.length < 1) {
    alert("请输入验证码!");
	document.getElementById("userauthcode").focus();
	return false;
  }
  
  return true;
}