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POjquery function starts before the page is loaded
 

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    <p>I have a php page, wich hase some external links to js files in the head, and on body I have some selectable elements from jquery(sometimes I do not have them, because thouse elements are generated if the user is login). The problem is in the javascript I wrote, I get this error: TypeError: Object [object Object] has no method 'disableSelection'. Even if I put a ".sortable" element in the php, I still get this error. In html looks like it has no problem with that and works fine. The code that gives me the error is this:</p> <p>Sorry for my english. I can put the hole code if you want but is too big. I think the problem is because the javascript is loading too fast or before of the html is generated.( I tried to put a variable in the js and that function under a if() but is not working)</p> <p>The javascipt(scripturi.js):</p> <pre><code> var logat=0; $(document).ready(function() { $( ".sortable0" ).sortable(); $( ".sortable0" ).disableSelection(); $( ".sortableIt" ).disableSelection(); $( ".sortableIt" ).sortable( { stop: function(event, ui) { for(var i=0;i&lt;ui.item.parent().children().length;i++) { var x =ui.item.parent().children()[i].id; //update items din acest sertar //updateItemServer(x,i) //alert(x+ " " + i); } } }); $( ".sortable" ).disableSelection(); $( ".sortable" ).sortable({ stop: function(event, ui) {reparaZindex();}}); }); function updateItemServer(x,i){ //alert(x+" "+i); } function incarca(){ $(document).ready(function (){ $.getJSON("http://students.info.uaic.ro/~calin.chifan/api/compartiment/list.json", function(data){ var html = []; /* loop through array */ $.each(data, function(index, d){ addCompartiment(d.nume_comp,d.id); }); }).error(function(jqXHR, textStatus, errorThrown){ /* assign handler */ alert("error occurred!"); }); }); } function addCompartiment(nume,id){ $("#sortable0").append('&lt;ul class="sortable" id'+ +'&gt;'); } function updateIndexServer(x,y){ //alert(x+" "+y); //trimite id-ul x si pozitia y } function reparaZindex(){ $.each($(".sortable &gt; li"), function() { if($(this).find('.sertar')[0]) { $(this).find('.sertar').eq(0).css('z-index',(500-$(this).index()*2)); updateIndexServer($(this).find('.sertar')[0].id,$(this).index()) } if($(this).find('.sortableIt')[0]) $(this).find('.sortableIt').eq(0).css('z-index',(501-2*$(this).index())); }); } window.onload = function() { //incarca(); //reparaZindex(); } </code></pre> <p>It's strange that in the html I don't have this problem. After the user is logedin I want to call a function that will append some ul (.selectable) elements but so far it can't even notice that there are some elements. If you want I can give you a link to the page I work.</p> <p>A little bit of the php:</p> <pre><code> &lt;?php ini_set('session.save_path', '/tmp/'); session_start(); $logged=0; if(isset($_SESSION['autentificat'])) { if($_SESSION['autentificat']==1) $logged=1; } $user= $_COOKIE['user']; echo' &lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt; &lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt; &lt;title&gt;Proiect Web&lt;/title&gt; &lt;meta charset="utf8"&gt; &lt;meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"&gt; &lt;title&gt;jQuery Dropdown Login Freebie | The Finished Box&lt;/title&gt; &lt;link rel="stylesheet" type="text/css" href="main.css"&gt; &lt;script src="//ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"&gt;&lt;/script&gt; &lt;script src="login.js"&gt;&lt;/script&gt; &lt;script src="scripturi.js"&gt;&lt;/script&gt; &lt;script src="dulap.js"&gt;&lt;/script&gt; &lt;script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/jquery-ui.js"&gt;&lt;/script&gt; &lt;script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/jquery-ui.min.js"&gt;&lt;/script&gt; &lt;script src="login.js"&gt;&lt;/script&gt; &lt;/head&gt;' ; if($logged==1) { echo'&lt;body onload="loadYeslog()"&gt;'; } else { echo'&lt;body onload="loadNoLog()"&gt;'; } echo '&lt;div class="mainbar"&gt; &lt;div id="loginContainer"&gt; &lt;div id="loginButton"&gt;&lt;span style="display:block;width:48px;height:27px; "&gt;Login&lt;/span&gt;&lt;/div&gt; &lt;div id="logoutButton" class="barbutton" style"cursor:pointer;"&gt;&lt;span&gt;Logout&lt;/span&gt;&lt;/div&gt;'; if($logged==0) { echo'&lt;div id="welcomeLabel" class="barbutton"&gt;&lt;span&gt;Not Logged in!&lt;/span&gt;&lt;/div&gt;'; } else { echo '&lt;div id="welcomeLabel" class="barbutton"&gt;&lt;span&gt;Welcome '.$user.' !&lt;/span&gt;&lt;/div&gt;'; } echo '&lt;div style="clear:both"&gt;&lt;/div&gt; &lt;div id="loginBox"&gt; &lt;form id="loginForm" action="autentificare2.php" method="POST"&gt; &lt;fieldset id="body"&gt; &lt;fieldset&gt; &lt;label for="username"&gt; Username&lt;/label&gt; &lt;input type="text" name="user"/&gt; &lt;/fieldset&gt; &lt;fieldset&gt; &lt;label for="password"&gt;Password&lt;/label&gt; &lt;input type="password" name="password"/&gt; &lt;/fieldset&gt; &lt;input type="submit" id="login" value="Sign in" /&gt; &lt;label for="checkbox"&gt;&lt;input type="checkbox" id="checkbox" /&gt;Remember me&lt;/label&gt; &lt;/fieldset&gt; &lt;span&gt;&lt;a href="recovery.php" style="color: white;"&gt;Forgot your password?&lt;/a&gt;&lt;/span&gt; &lt;div id="regbut"&gt;&lt;span&gt;New user ? &lt;/span&gt;&lt;/div&gt; &lt;/form&gt; &lt;/div&gt; &lt;div id="regbox"&gt; &lt;form id="registerform" action="register.php" method="POST"&gt; &lt;table style="margin-top:10px;"&gt; &lt;label for="Dusername"&gt; REGISTAR FOARM!!! &lt;/label&gt; &lt;tr&gt; &lt;td&gt; &lt;label for="Dusername"&gt; Username: &lt;/label&gt; &lt;/td&gt; &lt;td&gt;'; ?&gt; &lt;input type="text" name="Duser" placeholder="Introduceti numele de cont dorit" onblur="javascript:semnaleazaExistaNume (this.value, '')" /&gt; &lt;/td&gt; &lt;td&gt; &lt;span class="ascuns" id="eroareNume"&gt;Numele deja exista, alegeti altul... &lt;/span&gt; &lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt; &lt;label for="Dpassword"&gt; Password: &lt;/label&gt; &lt;/td&gt; &lt;td&gt; &lt;input type="password" name="Dpassword"/&gt; &lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt; &lt;label for="Demail"&gt; E-Mail: &lt;/label&gt; &lt;/td&gt; &lt;td&gt; &lt;input type="text" name="Demail"/&gt; &lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td&gt; &lt;input type="submit" id="register" value="Register" /&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/fieldset&gt; &lt;/table&gt; &lt;/form&gt; &lt;/div&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class="box"&gt; &lt;ul class="sortable0" id="sortable0"&gt; &lt;ul class="sortable" id="sortableColona1"&gt; &lt;li id="sertar1" style="z-index:10"&gt; &lt;img id="sertar11" class="sertar" ONCLICK="openS(this)" style="position: relative;z-index:500;aligh:center;" src="img/sertar1.png"&gt; &lt;ul id="ui items1" style="z-index:501;position:relative;visibility:hidden;" class="sortableIt" &gt; &lt;li id="item1" class="ui-state-default"&gt;1&lt;/li&gt; &lt;li id="item2" class="ui-state-default"&gt;2&lt;/li&gt; &lt;li id="item3" class="ui-state-default"&gt;3&lt;/li&gt; &lt;li id="item4" class="ui-state-default"&gt;4&lt;/li&gt; &lt;li id="item5" class="ui-state-default"&gt;5&lt;/li&gt; &lt;li id="item6" class="ui-state-default"&gt;6&lt;/li&gt; &lt;li id="item7" class="ui-state-default"&gt;7&lt;/li&gt; &lt;li id="item8" class="ui-state-default"&gt;8&lt;/li&gt; &lt;li id="item9" class="ui-state-default"&gt;9&lt;/li&gt; &lt;li id="item10" class="ui-state-default"&gt;10&lt;/li&gt; &lt;li id="item11" class="ui-state-default"&gt;11&lt;/li&gt; &lt;li id="item12" class="ui-state-default"&gt;12&lt;/li&gt; &lt;/ul&gt; &lt;/li&gt; &lt;/ul&gt; &lt;/div&gt; &lt;/body&gt; &lt;/html&gt; </code></pre>
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