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POjQuery not keeping track of validation errors correctly
 

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    <p>I have a small jQuery/AJAX script that checks if a username is already in use or not. It queries a PHP script, which in turn outputs the number of users with the specified username. I have an error counter that keeps track of the number of validation errors on the form, and I increment the counter if the username is already in use.</p> <pre><code>//Keep track of number of errors var errors = 0; //Keep track of error messages var errorMsg = ""; //Check if the passwords match (this part works as expected) if($("#password").val() != $("#repeat").val()) { errors++; errorMsg += "&lt;li&gt;Passwords do not match!&lt;/li&gt;"; } //Now check if the user exists var userName = $("#user").val(); $.ajax({ type: "POST", data : {'user': userName}, cache: false, url: "js/ajax/addUser.php?action=checkuser", success: function(data){ var result = parseInt(data); //For debugging purposes alert("Before checking the data, # of errors is: " + errors); if(result &gt; 0) { errors++; errorMsg += "&lt;li&gt;A user with the name &lt;strong&gt;" + userName + "&lt;/strong&gt; already exists!&lt;/li&gt;"; } //For debugging purposes alert("After checking the data, # of errors is: " + errors); } }); //For debugging purposes alert("Before validating the form, # of errors is: " + errors); if(errors &gt; 0) { //Output error message } else { //Send the form } </code></pre> <p>As mentioned in the comments, I have a few <code>alert()</code>'s for debugging. The first two (within the AJAX request) display the correct amount of errors. However, when I get to the third one, it completely disregards any errors that occurred within the AJAX request.</p> <p>I have trimmed my code down to just the essentials, but if the error is not clear within the snippet provided, I can post the entire thing.</p>
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    1. USAndrew De Forest
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