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POjQuery works only when the user enters the site for the first time
 

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  1. POjQuery works only when the user enters the site for the first time
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    <p>I am doing a sticky note web site where users can post msg etc onto post it notes. I am using jQuery UI with PHP. I was hoping to use AJAX to make it responsive but am having some issues with the page updating via ajax. </p> <p>The main issue is my jQuery appears to only work when the user enters the site for the first time, when they add some info through a form (and to database) my jQuery UI behaviour (i.e. drag and drop, getting attributes and position elements with CSS) stops working until a page refresh. It is like my ajax is passing new looped PHP content and jQuery is no longer recognising the .class I have applied!</p> <p>Hopefully this or my code makes sense, I am still new to ajax and coding in general.</p> <p>Main page - pert.php</p> <pre><code> &lt;html&gt; &lt;header&gt; &lt;link rel="stylesheet" href="style.css" type="text/css"/&gt; &lt;script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"&gt;&lt;/script&gt; &lt;script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.16/jquery-ui.min.js"&gt;&lt;/script&gt; &lt;link rel="stylesheet" type="text/css" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.1/themes/base/jquery-ui.css"/&gt; &lt;script type="text/javascript" src="js/fancybox/jquery.fancybox-1.3.4.pack.js"&gt;&lt;/script&gt; &lt;script type="text/javascript" src="js/fancybox/jquery.easing-1.3.pack.js"&gt;&lt;/script&gt; </code></pre> <p></p> <pre><code>&lt;script type="text/javascript"&gt; jQuery(document).ready(function() { $("#addtask").submit(function() { //$("#form").serialize(); $.post('update.php', $("#addtask").serialize(),function(data){ $("#result").html(data); }); return false; //stop browser refresh }); //looping through Post it Notes to apply to all within class $(".task").each(function(index){ //store x, y from looped php var x = $(this).attr("x"); var y = $(this).attr("y"); //assign looped php to css $(this).css("left",x); $(this).css("top",y); //attach draggable behaviour $(this).draggable({ cursor: 'move', stack: '.post', opacity: '0.5', containment: '#container' }); //store variables x, y and id for database via mouse move and ajax $(this).mouseup(function(){ var coord=$(this).position(); var h = $(this).height(); var w = $(this).width(); var coordLeft = coord.left; var coordTop = coord.top; var noteid = $(this).attr("taskid"); })//loop done })//jquery end &lt;/script&gt; &lt;/header&gt; &lt;body&gt; &lt;h4&gt;Draggable Stickies&lt;/h4&gt; &lt;!--&lt;p&gt; Click here to &lt;a class = "addimage" href="addimage.html"&gt;Add image&lt;/a&gt; &lt;/p&gt;--&gt; &lt;form id="addtask"&gt; Task Desc:&lt;input type="text" name="taskdesc"/&gt; &lt;input type="submit" value="Enter"/&gt; &lt;/form&gt; &lt;div id="result"&gt; &lt;? include "connectdb.php"; //looping through stored desc $querySticky=mysql_query("SELECT * FROM tasks"); while($r=mysql_fetch_array($querySticky)){?&gt; &lt;div class="task" x="&lt;? echo $r["x"]; ?&gt;" y="&lt;? echo $r["y"]; ?&gt;" id="&lt;? echo $r["taskid"]; ?&gt;"&gt; x=&lt;? echo $r["x"]; ?&gt; y=&lt;? echo $r["y"]; ?&gt;&lt;p&gt;&lt;? echo $r["taskdesc"];?&gt;&lt;/p&gt; &lt;/div&gt; &lt;?}?&gt; &lt;/div&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>accessing database - update.php</p> <pre><code> &lt;? include("connectdb.php"); if(ISSET($_POST['taskdesc'])){ $taskdesc = $_POST['taskdesc']; $queryinsert1="INSERT INTO tasks(taskdesc)VALUES('$taskdesc')"; $result=mysql_query($queryinsert1); } //for updating coordinates in database not in use y if(ISSET($_POST['taskid'])){ $x = $_POST['x']; $y = $_POST['y']; $id = $_POST['taskid']; $addxyquery="UPDATE tasks SET x = '$x', y ='$y' WHERE taskid='$id'"; $result=mysql_query($addxyquery); } //looping through stored desc for updated results $querySticky=mysql_query("SELECT * FROM tasks"); while($r=mysql_fetch_array($querySticky)){?&gt; &lt;div class="task" x="&lt;? echo $r["x"]; ?&gt;" y="&lt;? echo $r["y"]; ?&gt;" id="&lt;? echo $r["taskid"]; ?&gt;"&gt; x=&lt;? echo $r["x"]; ?&gt; y=&lt;? echo $r["y"]; ?&gt;&lt;p&gt;&lt;? echo $r["taskdesc"];?&gt;&lt;/p&gt; &lt;/div&gt; &lt;?}?&gt; </code></pre>
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    1. COIf JavaScript suddenly stops working, it's almost always because there are errors in the JavaScript code. Are there any errors in the JavaScript error console?
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    2. COPut all js to external file and run it through JSLint/JSHint. It will save you a tone of time.
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      1. USIvan Ivanić
 

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