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POWhen using $.ajax in jQuery, how can I deliberately throw an error in the loaded document?
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copied!<p>In my document I have this script:</p> <pre><code>$.ajax({ type:"POST",url:"ajax.php",data:data, success: function() { //onsuccess }, error: function() { //onerror } }); </code></pre> <p>How can I, in the document <code>ajax.php</code>, deliberately throw an error? Is it sufficient to just throw an 400 HTTP Status Code or something? (And if so, is 400 the right one?)</p> <p>Why I'm asking is that I want to use this to submit a form to the server, and if a field isn't filled out properly I want to alert the user through the error parameter in <code>$.ajax</code>. I know I could do this using javascript in the first place, but I'm hoping I could do it this way (so I don't have to write the verification two times). <strong>But of course by doing it this way, I can't separate the different fields from the other.</strong></p> <p>Based on what I want to use it for, <strong>can I somehow throw a "custom error"</strong>, so if the field <code>name</code> hasn't been filled out properly, it returns the name of the field (i.e. <code>name</code>). Is it sufficient to do something like this:</p> <p>In ajax.php:</p> <pre><code>if (isFilledOutProperly($name) == false) { echo "name"; } else { echo "success"; } </code></pre> <p>And: </p> <pre><code>success: function(data) { if (data == 'name') { //error } else { //success } }, </code></pre> <p>I may be on the wrong track here, but if someone have a better suggestion on how I can do this, please tell me. Thanks!</p>

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