function checkReturnKey(e)
{
  var keynum;
  var keychar;
  var numcheck;
  if(window.event) // IE
  {
    keynum = e.keyCode;
  }
  else if(e.which) // Netscape/Firefox/Opera
  {
    keynum = e.which;
  }
  if (keynum == 13)
  {
    displayAlertLogin();
  }
}

function displayAlertLogin()
{
  
  var alertMsg = "";
  var errorFlag = 0;
  var pars = "";
  
  if(alltrim($('username').value) == "")
  {
    alertMsg = "User name can not be blank.";
    errorFlag++;
  }
  else if(checkEmail($('username').value) == false)
  {
    alertMsg = "Invalid email address.";
    errorFlag++;
  }
  else if(alltrim($('userpassword').value) == "")
  {
    alertMsg = "Password can not be blank.";
    errorFlg++;
  }
  
  if (errorFlag == 0)
  {
    pars = "mode=Login&username="+escape($('username').value)+"&password="+escape($('userpassword').value);
    var url  = "validation.php";
    var myAjax = new Ajax.Request(
    url,
    {
      method: 'get',
      parameters: pars,
      onComplete:ajx_doJob
    });
  }
  else
  {
    $('loginAlertDiv').innerHTML = alertMsg;
    $('loginAlertDiv').style.display = 'block';
  }
  
  
}
function ajx_doJob(originalRequest)
{
  var response = originalRequest.responseText;
  var respArr = response.split('^|^');
  if(respArr[0].indexOf('error') != -1)
  {
    $('loginAlertDiv').innerHTML = respArr[1];
    $('loginAlertDiv').style.display = 'block';
  }
  else if(respArr[0].indexOf('success') != -1)
  {
    window.location.href = 'fundraisingpage.php?userId='+respArr[1];
  }
  
  
}