You can use the return value of the function to prevent the form submission <form name=”myForm” onsubmit=”return validateMyForm();”> and function like <script type=”text/javascript”> function validateMyForm() { if(check if your conditions are not satisfying) { alert(“validation failed false”); returnToPreviousPage(); return false; } alert(“validations passed”); return true; } </script> In case of Chrome 27.0.1453.116 m if above … Read more
Disabling Chrome Autofill
The code below demonstrates on how to do this. var http = new XMLHttpRequest(); var url=”get_data.php”; var params=”orem=ipsum&name=binny”; http.open(‘POST’, url, true); //Send the proper header information along with the request http.setRequestHeader(‘Content-type’, ‘application/x-www-form-urlencoded’); http.onreadystatechange = function() {//Call a function when the state changes. if(http.readyState == 4 && http.status == 200) { alert(http.responseText); } } http.send(params); In … Read more
This is a simple reference: // this is the id of the form $(“#idForm”).submit(function(e) { e.preventDefault(); // avoid to execute the actual submit of the form. var form = $(this); var actionUrl = form.attr(‘action’); $.ajax({ type: “POST”, url: actionUrl, data: form.serialize(), // serializes the form’s elements. success: function(data) { alert(data); // show response from the … Read more
JavaScript post request like a form submit
Introduction This can have a lot of causes which are broken down in following sections: Put servlet class in a package Set servlet URL in url-pattern @WebServlet works only on Servlet 3.0 or newer javax.servlet.* doesn’t work anymore in Servlet 5.0 or newer Make sure compiled *.class file is present in built WAR Test the … Read more
How do you disable browser autocomplete on web form field / input tags?
PART I: How To Log In We’ll assume you already know how to build a login+password HTML form which POSTs the values to a script on the server side for authentication. The sections below will deal with patterns for sound practical auth, and how to avoid the most common security pitfalls. To HTTPS or not … Read more
You should use document.getElementsByName if you want to fetch the value using name attribute. I would recommend to do it by “id” attribute. function submitFunction() { var firstName = document.getElementsByName(“first_Name”)[0].value; if (firstName == “” || firstName == null || firstName.length == 0) { alert(“First Name is required”); return false; } } Also add return to … Read more
Check whether the field is empty before adding it to the mail. foreach($fields as $a => $b) { if (!empty($_REQUEST[$a])) { $body .= sprintf(“%20s:%s\n”,$b,$_REQUEST[$a]); } }