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    <p>The quickest fix would be:</p> <p>where you open the XMLHttpRequest object: <code> http.open("POST", "deletepost.php", true) </code> change the url to be "deletepost.php?number="+num</p> <p>then in you php page change the POST to a GET. <code> $number = $_GET['number'] </code></p> <p>POST allows you to send large amounts of parameters/options around but unless your numbers are going to be more than 140 characters long, this will make no difference. There appears to be a common mis-conception that POST is more secure than GET, simply because it seems more obvious how to get a browser to manipulate the post variable. However, it is a very very small stretch to do the same thing with POST variables so security should not depend on POSTing rather than GETting. There's nothing wrong with using POST except that you don't seem to be able to get it to work easily. I would never do this directly in javascript. I would always use something like jquery. You could replace the whole script with the following and it would work in most browsers:</p> <pre><code> function rdel(num) { $.post("/webroot/deletepost.php", {number: num}, function(dat){ $("tr#r" + num).fadeOut("slow"); // jquery fadeout animation alert(dat.responseText); // this alerts whatever deletepost.php }); } </code></pre> <p>by the way, in your selector $('tr#r'+num), the tr is unnecessary since the id's on a page are unique so the result will be the same as $('#r'+num) but would take longer to calculate the selector. Reference by id is the fastest, the former finds all tr tags and then finds the id within that collection, rather than using the 'native' getElementById function by just using id in the selector. In short, don't make jquery do anything you don't need it to do ;)</p>
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    1. POHow to I post a value through the XMLHTTPRequest Object?
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