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  • Can't find the error in my javascript code

    - by Olivier
    This js program should display the first 100 prime numbers, but instead it crashes each and every time and I can't find the error! Could someone point me towards the best way to debug js code?! Thank you! // initialisation of the array p holding the first 100 prime numbers var p = []; // set the first prime number to 2 p.push(2); // find the first 100 prime numbers and place them in the array p var i = 3; while (p.length < 100) { var prime = true; loop: for (var item in p){ if (i%item === 0){ prime = false; break loop; } } if (prime) p.push(i); i = i + 2; } // display the first 100 prime numbers found var i=1; for (var item in p){ document.writeln(i,item); i++; }

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  • javascript splice() indexing problem

    - by markzzz
    hello! i have to add some value into an array. code for example : temp[0]=new Array("0","0"); temp[1]=new Array("0","0"); temp[2]=new Array("0","0"); temp[3]=new Array("0","0"); temp[4]=new Array("0","0"); vt=new Array("1","0"); temp.splice(3, 0, vt); temp.splice(4, 0, vt); temp[3][1]="R"; i aspect this output : 1 - 0,0 2 - 0,0 3 - 0,0 4 - 1,R 5 - 1,0 6 - 0,0 7 - 0,0 but the output is : 1 - 0,0 2 - 0,0 3 - 0,0 4 - 1,R 5 - 1,R 6 - 0,0 7 - 0,0 any idea? i think it's a indexing problem with splice() function! cheers

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  • Javascript: sort objects

    - by tom
    function Player() { var score; this.getScore = function() { return score; } this.setScore = function(sc) { score = sc; } } function compare(playerA, playerB) { return playerA.getScore() - playerB.getScore(); } var players = []; players['player1'] = new Player(); players['player2'] = new Player(); Array(players).sort(compare); I have code that is similar to the above. When I step through the code with a debugger, the compare function never gets called and the array isn't sorted. I'm not sure what's wrong with my code?

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  • How to print object data in javascript

    - by rxzhang
    I have the following object data: var response = { "response": { "numFound": 7945, "docs": [{ "description": "target", "url": "target", "id": "269653", "score": 6.9186745 }, { "description": "Target Kent", "url": "Target_Kent", "id": "37275", "score": 4.3241715 }] }, "highlighting": { "269653": { "description": ["<em>target</em>"] }, "37275": { "description": ["<em>Target</em> Kent"] } } }; I can use response.response.docs[0].description to print out "target". But I don't know how to print out "<em>target</em>". Thanks.

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  • Javascript memory leak/ performance issue?

    - by Tom
    I just cannot for the life of me figure out this memory leak in Internet Explorer. insertTags simple takes string str and places each word within start and end tags for HTML (usually anchor tags). transliterate is for arabic numbers, and replaces normal numbers 0-9 with a &#..n; XML identity for their arabic counterparts. fragment = document.createDocumentFragment(); for (i = 0, e = response.verses.length; i < e; i++) { fragment.appendChild((function(){ p = document.createElement('p'); p.setAttribute('lang', (response.unicode) ? 'ar' : 'en'); p.innerHTML = ((response.unicode) ? (response.surah + ':' + (i+1)).transliterate() : response.surah + ':' + (i+1)) + ' ' + insertTags(response.verses[i], '<a href="#" onclick="window.popup(this);return false;" class="match">', '</a>'); try { return p } finally { p = null; } })()); } params[0].appendChild( fragment ); fragment = null; I would love some links other than MSDN and about.com, because neither of them have sufficiently explained to me why my script leaks memory. I am sure this is the problem, because without it everything runs fast (but nothing displays). I've read that doing a lot of DOM manipulations can be dangerous, but the for loops a max of 286 times (# of verses in surah 2, the longest surah in the Qur'an).

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  • Clean Javascript Info Popup

    - by steve
    I'm just trying to figure out exactly what kind of script this is, and where I can find more info on implementing it. Not sure exactly what to call it. If you click on one of the speakers here, you can see it in action: http://www.howconference.com/speakers/

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  • Html file upload preview by Javascript

    - by openidsujoy
    I want to show a PREVIEW kind of thing for an post , so took details by JS but problem comes when it comes to <input type="file" , it's not giving full path to the file Ex: if I do $("#image").val(); it only give "Sunset.jpg" not C:\Documents and Settings\All Users....\Sunset.jpg any idea how to get that detail value?

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  • how to make a javascript number keypad popup

    - by user2434653
    i have a website with 3 pages. each page has a form with two input fields. i am trying to make a popup number-keypad that will populate what ever input field called it. below is that base code i keep coming back to. <html> <head><title>test</title></head> <body> <script> function num(id) { return document.getElementById(id); } </script> <form action="/unitPage" method="POST" style=" text-align:center;"> Prefix: <input id="num" name"prefix" type="text" onfocus="num('keypad').style.display='inline-block';"/> Number: <input id="num" name"number" type="text" pattern="[0-9]{6}" onfocus="num('keypad').style.display='inline-block';"/> </form> <div id="keypad" style="display:none; background:#AAA; vertical-align:top;"> <input type="button" value="7" onclick="num('num').value+=7;"/> <input type="button" value="8" onclick="num('num').value+=8;"/> <input type="button" value="9" onclick="num('num').value+=9;"/><br/> <input type="button" value="4" onclick="num('num').value+=4;"/> <input type="button" value="5" onclick="num('num').value+=5;"/> <input type="button" value="6" onclick="num('num').value+=6;"/><br/> <input type="button" value="1" onclick="num('num').value+=1;"/> <input type="button" value="2" onclick="num('num').value+=2;"/> <input type="button" value="3" onclick="num('num').value+=3;"/><br/> <input type="button" value="X" onclick="num('keypad').style.display='none'"/> <input type="button" value="0" onclick="num('num').value+=0;"/> <input type="button" value="&larr;" onclick="num('num').value=num('num').value.substr(0,num('num').value.length-1);"/> </div> </body> </html> is there a way of making one number key pad that i call from any page or do i need to make the above for each input? thanks

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  • javascript window.close, once again

    - by John Kjøller
    Im sorry if I havent done my research properly, - but couldnt find the answer I needed, so here goes: From my main page I open a new window using mainPlayer = window.open(); This window stays open until user clicks on a mainPlayer.close(); event. (or simply x closes the window) However, the idea is to make it possible to let the player keep playing, while browsing around the rest of the pages. But as soon as the user leaves the page that opened the mainPlayer window, the reference to the mainPlayer window seem to be lost. How do I, from the site's other pages, check if the mainPlayer window is open and close it on a click event? Thx John

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  • Check through Javascript that page is loading something

    - by Lilitu88
    When the browser is loading something on a page you can see it in the status bar that it says "Waiting for..." or "Transfering..." etc. In firebug you can check in the net tab when something is being loaded and see when it stops. That is what I want. Is there a way for me to trigger an event when that happens ? Or to get the status of the page or something ? Any way for me to know when that changes ? I know I can do this easier if I use Ajax, but I can't since the page it's expecting an Excel report. Thanks

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  • Detect the file size of a link's href using JavaScript

    - by noblethrasher
    Hi, Would like to write a script to detect the file size of the target of a link on a web page. Right now I have a function that finds all links to PDF files (i.e. the href ends with '.pdf') and appends the string '[pdf]' to the innerText. I would like to extend it so that I can also append some text advising the user that the target is a large file (e.g. greater than 1MB). Thanks

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  • Skip video in youtube playlist using javascript

    - by peirix
    I've looked through the YouTube JS API, but can't find a way to jump to a video in a playlist. (Mimicking the built-in navigation) And if you're wondering why I'd want both, it's because I have a menu set up with additional information, and want to let the user click these links to jump between the videos.

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  • Javascript & jquery : Unable to increment within a form

    - by Daniyal
    I got a simple increment function like this: $(function(){ $("#inc").click(function(){ var value = parseInt($(":text[name='ice_id']").val()) + 1; $(":text[name='ice_id']").val(value); }); $("#dec").click(function(){ var value = parseInt($(":text[name='ice_id']").val()) - 1; $(":text[name='ice_id']").val(value); }); }); the ice_id text field is embedded within a form <form id="masterSubmit" name="masterSubmit" action="" method="post"> <td><input id="ice_id" type="text" name="ice_id" size="16" maxlength="15"></td> </form> When I try now to increment , it successfully increments a number, but shows the following weird behavior: It 'refreshes' the site, so that the content of the text field is gone. This behavior disappears, if I comment out the form tags ...unfortunately the form tags are required for an AJAX-submit. Are there any ways to avoid this problem? Thanks in advance for any hints and best regards Daniyal

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  • IE problem with javascript

    - by Syom
    i have the following simple script <input class="input" type="text" name="password" style="color: #797272;" value= "<?php if ($_POST[password] != '') {echo '';} else {echo '????????';}?>" onclick="if (this.value === this.defaultValue) { this.value=''; this.style.color='black'; this.type='password'; }" /> it works fine, but in IE7 it doesn't change the input type. this.type='password'; doesn't work could you help me? thanks

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  • JavaScript, transform object into array

    - by Šime Vidas
    I've got an object: var obj = { "Mike": 24, "Peter": 23, "Simon": 33, "Tom": 12, "Frank": 31 }; I want to create an array that holds the values of the object. The keys (key names) can be disregarded: [24, 23, 33, 12, 31] The order of the values is NOT important! One solution (obviously) would be do have a function that takes the values and puts them into an array: var arr = valuesToArray(obj); I will accept such a function as the answer. However, I would be more pleased if there would be an API function (ECMAScript, jQuery, browser-specific, ...) that could do this. Is there such a thing?

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  • Javascript, IE, Strings, and Performance problems

    - by Infinity
    Hey guys, So we have this product, and it's really slow in IE. We've already applied a lot of the practices advised by the IE guys themselves (like this, and this), and try to sacrifice clean code for performance in the critical parts like DOM manipulation. However, as you can see in this IE profiler screenshot.. Just "String" is the biggest offender. Almost 750ms of exclusive time. Does this mean IE is spending 750ms just instantiating Strings? I also read this stuff on the Opera dev blog: A build script can remove whitespace, comments, replace strings with Array lookups (to avoid MSIE creating a string object for every single instance of a string — even in conditions) But no more info regarding this. Anyone can clarify? It seems like IE has to create a full String instance every time you have " " in your code, which could explain this, but I don't know what the array lookup optimization would look like. BTW- we don't really do much of string concatenation anywhere in the code. The library we use is MooTools 1.2.4 Any suggestions will be appreciated! Thx

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  • javascript font size not working

    - by Fernando SBS
    why this don´t work: function rp_insertTable() { FM_log(3,"rp_insertTable() called"); var farmTable = dom.cn("table"); var ftableBody = dom.cn("tbody"); var i; var maximize = GM_getValue("Maximize_" + suffixGlobal, 0); farmTable.className = "FMtbg"; farmTable.id = "farmMachineTable"; farmTable.setAttribute('cellpadding', 2); farmTable.setAttribute('cellspacing', 1); farmTable.style.marginBotton = "12px"; farmTable.style.font = "bold 12px arial,serif"; farmTable.style.font = "bold 12px arial,serif"; the font does change in format, but the font size is not working, I can put 100px and it deosn´t change anything, why is that?

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  • Using JQuery replaceWith with a JavaScript Variable

    - by JJ56
    Here's my html: <div class="timer">Not Started</div> And JS/JQ: var seconds = 10; var minutes = 0; setTimeout("updateTimer()", 1000); function updateTimer() { if (seconds == 0 && minutes != 0) { minutes -= minutes; seconds = 59; alert (seconds); } else if (seconds == 1 && minutes == 0) { alert ('done'); } else { seconds = seconds - 1; //alert (seconds); $(".timer").replaceWith(seconds); } setTimeout("updateTimer()", 1000); } Instead of replacing Not Started with 10, 9, 8..., Not Started disappears.

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  • Javascript push Object to cookies using JSON

    - by Hunkeone
    Hi All on click button I need to add object to array and then write array to cookies. From the start this array can be not empty so I parse cookie first. function addToBasket(){ var basket = $.parseJSON($.cookie("basket")) if (basket.length==0||!basket){ var basket=[]; basket.push( { 'number' : this.getAttribute('number'), 'type' : this.getAttribute('product') } ); } else{ basket.push( { 'number' : this.getAttribute('number'), 'type' : this.getAttribute('product') } ); } $.cookie("basket", JSON.stringify(basket)); } And HTML <button type="button" class="btn btn-success btn-lg" number="12" product="accs" onclick="addToBasket()">Add</button> Unfortunately I'm getting Uncaught ReferenceError: addToBasket is not defined onclick. Can't understand what am I doing wrong? Thanks!

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  • Javascript date comparison

    - by Art
    Why does equality operator return false in the first case? var a = new Date(2010, 10, 10); var b = new Date(2010, 10, 10); alert(a == b); // <- returns false alert(a.getTime() == b.getTime()); // returns true Why?

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  • How to color a treeview node in javascript

    - by hero
    i have a treeview and a texbox that allows a user to search for nodes inside the treeview. i already wrote the JS function that determines if a node exists in the treeview. what i want is to color the node that the user have searched for. how can i do this??

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