Random HTTP error 405 while using ajax request - ajax

Question

I am getting HTTP error 405 verb not allowed. As sometimes code works and sometimes throws http 405 error, I need to understand whether this is programming problem or server configuration problem. I am using ajax with jquery. I have gone through all related posts here and tried all recommended options related with the code. Please help.
my javascript code is as follows
$(function() {
$('.error').hide();
$(".button").click(function() {
// validate and process form
// first hide any error messages
$('.error').hide();
var name = $("input#name").val();
if (name == "") {
$("label#name_error").show();
$("input#name").focus();
return false;
}
var email = $("input#email").val();
if (email == "") {
$("label#name_error").show();
$("input#email").focus();
return false;
}
var textquery = $("textarea#textquery").val();
if (textquery == "") {
$("label#name_error").show();
$("textarea#textquery").focus();
return false;
}
var dataString = name + email + textquery;
// alert (dataString);return false;
$.ajax({
type: "POST",
url: "samplemail.aspx",
data: dataString,
success: function() {
$('#contact_form').html("<div id='message'></div>");
$('#message').html("<h2>Contact Form <br> Submitted!</h2>")
.append("<p>We will be in touch soon.</p>")
.hide()
.fadeIn(1500, function() {
$('#message').append("<img id='checkmark' src='images/check.png' />");
});
}
});
return false;
});
});
runOnLoad(function(){
$("input#name").select().focus();
});

Answer 1

Problem solved
the way Of passing parameter was wrong i.e.data : datastring .
The correct way is data : { name : name, email: email, textquery: textquery}