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PO"Object doesn't support..." IE8 stops at declaring ordinary variable
 

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  1. PO"Object doesn't support..." IE8 stops at declaring ordinary variable
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    <p>I'm trying to make a form send its data through AJAX and cancel the event sans jQuery, just for learning native javascript, which can never be bad, i figured. Anyway, this code is returning the error "Object doesn't support this property or method" in IE8 at the line where I declare variables s and r in the send() function. I figured the problem must actually be elsewhere? Code works in both Firefox and Chrome, returning no errors. Ideas?</p> <pre><code>// Function to serialize form function serialize() { var a = document.getElementsByTagName('input'), b = ''; for (i = 0; i &lt; a.length; i++) { b += a[i].name + '=' + a[i].value + '&amp;'; } return b.substring(0, b.length - 1); } // Function to execute when user submits form function send(evt) { // Prevent the page from reloading if (evt.preventDefault) { evt.preventDefault(); } else { evt.returnValue = false; } // Declare DOM variables for quick access var s = document.getElementsByClassName('skicka')[0], r = document.getElementById('return'); // Hides the submit button and return text s.style.visibility = 'hidden'; r.style.visibility = 'hidden'; // Initialize and send data and request to login.php var xhr = new XMLHttpRequest(); xhr.open('POST', 'login.php', true); xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded'); xhr.send(serialize()); // Check for return value from login.php xhr.onreadystatechange = function() { if (xhr.readyState == 4) { if (xhr.responseText == true) { // If response if true, reload page window.location.reload(true); } else { // If response is false, reset form and show response s.style.visibility = 'visible'; r.style.visibility = 'visible'; r.innerHTML = xhr.responseText; } } }; return false; } // Declare event listeners if (window.addEventListener) { window.addEventListener('load', function() { document.forms[0].addEventListener('submit', send, false); }, false); } else { window.attachEvent('onload', function() { document.forms[0].attachEvent('onsubmit', function() { send(window.event); }); }); } </code></pre>
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    1. USMarcelo
    1. USfredrikekelund
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      1. PO"Object doesn't support..." IE8 stops at declaring ordinary variable
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    2. VO
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      1. VTApproveEditSuggestion
    1. COsingle-letter variable names always make debugging painful. :-/
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      1. USSpudley
    2. COI'll keep that in mind I think :)
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      1. USfredrikekelund
 

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