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POHow could I stop spam if my form is using ajax submit method (with no reload)?
 

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  1. POHow could I stop spam if my form is using ajax submit method (with no reload)?
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    <p>I have a form which uses ajax for data submitting. Here is the html:</p> <pre><code>&lt;form&gt; &lt;input type="text" id="content" name="content"&gt; &lt;input type="submit" class="button" name="button"&gt; &lt;/form&gt; </code></pre> <p>and the JavaScript (jQuery):</p> <pre><code>$(function() { //Update Message... $(".button").click(function() { var boxval = $("#content").val(); var dataString = 'content='+ boxval; if(boxval=='') { alert("Please Enter Some Text"); } else { $("#flash").show(); $("#flash").fadeIn(400).html('&lt;img src="ajax-loader.gif" align="absmiddle"&gt; &lt;span class="loading"&gt;Loading Comment...&lt;/span&gt;'); $.ajax({ type: "POST", url: "update_data.php", data: dataString, cache: false, success: function(html){ $("ol#update").prepend(html); $("ol#update li:first").slideDown("slow"); document.getElementById('content').value=''; document.getElementById('content').focus(); $("#flash").hide(); } }); } return false; }); }); </code></pre> <p>It is all working fine, but there is a big problem: I cannot stop spam. Last time I used spam filters, it was in PHP (I used a hidden input and then checked in the PHP file if it is filled out). But that was totally in PHP, no JS.</p> <p>So here is my question: How could I stop spam in this form submission? Also, can I create an <code>if</code> statement in the <code>update_data.php</code> file?</p>
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    1. COFirst of all, you need to start indenting your code and stop mixing jQuery with plain JavaScript (`document.getElementById('content').value=''; document.getElementById('content').focus();` => `$('#content').val().get(0).focus()`). Besides that, if you create a form that has no valid `action` bots are unlikely to successfully submit it - and for real users with JavaScript enabled you specify the target URL in the $.ajax call anyway.
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