document.observe("dom:loaded", function() {
    $("white_paper_button").observe("click", revealForm);
    $("close").observe("click", hideForm);
    $("submit").observe("click", submitForm);
  }
);

function revealForm() {
  Effect.Appear($("request_white_paper"), { duration: "0.5" });
}

function hideForm(event) {
  event.stop();
  Effect.Fade($("request_white_paper"), { duration: "0.5" });
  $("feedback").innerHTML = "";
}

function submitForm(event) {
  event.stop();
  var email = $("email").value;
  var name = $("name").value;
  if (echeck(email)) {
  $("feedback").style.color = "green";
      new Ajax.Request("script/mailer.php", {
method: "post",
parameters: { email : $("email").value, name: $("name").value, whitepaper: "true" },
onSuccess: mailSuccess,
onFailure: mailFailure,
onException: mailFailure
});

  }
}
  
function mailSuccess(ajax) {
  $("feedback").innerHTML = (ajax.responseText);
}

function mailFailure(ajax) {
  $("feedback").innerHTML = ("Server Error, Please Try Again Later");
}

function echeck(str) {

  var at="@"
    var dot="."
    var lat=str.indexOf(at)
    var lstr=str.length
    var ldot=str.indexOf(dot)
    if (str.indexOf(at)==-1){
      $("feedback").innerHTML=("Invalid email address.");
        return false
    }

  if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
      $("feedback").innerHTML=("Invalid email address.");
      return false
  }

  if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
      $("feedback").innerHTML=("Invalid email address.");
      return false
  }

  if (str.indexOf(at,(lat+1))!=-1){
      $("feedback").innerHTML=("Invalid email address.");
      return false
  }

  if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
      $("feedback").innerHTML=("Invalid email address.");
      return false
  }

  if (str.indexOf(dot,(lat+2))==-1){
      $("feedback").innerHTML=("Invalid email address.");
      return false
  }

  if (str.indexOf(" ")!=-1){
      $("feedback").innerHTML=("Invalid email address.");
      return false
  }

  return true          
}

function ValidateForm(){
  var emailID=document.frmSample.txtEmail

    if ((emailID.value==null)||(emailID.value=="")){
      alert("Please Enter your Email ID")
        emailID.focus()
        return false
    }
  if (echeck(emailID.value)==false){
    emailID.value=""
      emailID.focus()
      return false
  }
  return true
}

function mailSuccess(ajax) {
  $("feedback").innerHTML=(ajax.responseText);
}

function mailFailure(ajax) {
  $("feedback").innerHTML=("Server Error, Please Try Again Later");
}