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  • How to automatically reflect the new Updates (on Database) to User Pages

    - by user296436
    I am trying to create a new Notice Alert using PHP and Javascript. Suppose that a 100 users are currently logged into to the Online Notice Board Application and any One user posts a new notice. I want an immediate alert signal on all the users screen. I know, that the simplest way of doing it is to constantly Ping the server but I don't want to do it as it will slow down the server. Moreover, I am on a shared host. So I don't have access to any Socket Port. That means, I cannot establish any direct Socket Communication Channel from the Server to the User Machine. Can any one suggest me some other solution to this kind of problems???

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  • trying to understand some codes related to window.onload in js

    - by user2507818
    <body> <script language="javascript"> window.tdiff = []; fred = function(a,b){return a-b;}; window.onload = function(e){ console.log("window.onload", e, Date.now() ,window.tdiff, (window.tdiff[1] = Date.now()) && window.tdiff.reduce(fred) ); } </script> </body> Above code is taken from a site. In firefox-console, it shows: window.onload load 1372646227664 [undefined, 1372646227664] 1372646227664 Question: For window.tdiff->[undefined, 1372646227664], why not:[], because when runs to code:window.tdiff, it is still an empty array? For window.tdiff.reduce(fred)->1372646227664, window.tdiff = [undefined, 1372646227664], undefined - 1372646227664, should be NaN, why it shows 1372646227664?

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  • Changing the context of a self-executing function

    - by TaylorMac
    This code is copied directly from: http://www.bennadel.com/blog/2264-Changing-The-Execution-Context-Of-Your-Self-Executing-Function-Blocks-In-JavaScript.htm // Set the singleton value to the return value of the self- // executing function block. var singleton = (function(){ // Declare a private variable. var message = "Stop playing with your context!"; this.getMessage = function(){ return( message ); }; // Return this object reference. return( this ); }).call( {} ); // alert the singleton message. alert( "Message:", singleton.getMessage()); ?My thought is that I can use this to better contain the variables and functions in my programs. However, when I try to run the code in a JSfiddle: http://jsfiddle.net/xSKHh/ It does not return the message. What am I missing?

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  • Setting height of a DIV to correspond with location of anchor inside said DIV

    - by filip
    Core issue : http://jsfiddle.net/pipip/P46Xg/ I have a div container with a few paragraphs of text, and inside one of these paragraphs is the following anchor <a id="stop" /> The container is set to overflow:hidden Is it possible with javascript / JQuery to set the height of the container so that the bottom of the container stops exactly at or below the anchor? Added Depth & Background : http://jsfiddle.net/pipip/yj9dB/ This would be used for a modified JQuery Slider. Where someone using a CMS could type [readmore] anywhere into the Content field, which would be replaced by the above anchor via PHP. This way they would be easily able to control where the Read More break appears within the container. In the associated example I am hard-coding the height to 75px, although what I want is for the height to be dependent on the location of the anchor id="stop" in the text. Thanks. If this is an awful way to go about it, I'm all ears!

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  • Cakephp 1.3 JsHelper for AjaxHelper

    - by erick2red
    Hi: I'm start using cakephp and i made a demo app using AjaxHelper $ajax->link('title', 'url', array('update' => 'mydiv')) Now i want to migrate that to cakephp 1.3 and AjaxHelper is deprecated on cake 1.3 and will be removed, so i want to accomplish the same with JsHelper which is replacing the functionality of AjaxHelper and JavascriptHelper I just can't find how to do that. I want to upgrade the versions to use jQuery out of the box with cakephp 1.3 and get rid of Prototype javascript library. so, any help ? I've already read the migration guide and nothing found yet.

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  • What is the compatible JQuery line of code for IE7 and IE8?

    - by user144842
    This line of code is working fine for Firefox $("#<%=txt1.ClientID%>").text() but not for IE8 and IE7. See the scenario below in order to understand what I really mean:- Scenario:- Loading .aspx page. populating text box with some data from database. Now user changes data in same text-box at client-side (means page not yet submitted) So here in firefox, the above line of javascript is showing me the actual data came from database, but IE7&8 showing me the changed data. But I want actual data. So i need some compatible code for IE7 & IE8 I hope i explained it well what i need. Thanks in advance

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  • Get link position on screen from google search results

    - by Revelation
    I want to make an app in .net to search on google for a keyword and click on a specific link from the results. Like a bot. How can I get the coordinates of screen where the specific link appears in search results so I can do a click on it. The component where the page loads will have javascript enabled so just parsing the html is not enought. It must look like a real user is clicking on the link.( it`s for a school project involving seo) or What is the best approach to do this ?

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  • How can I disallow all HTML using markdown (PHP and JS)?

    - by peterjwest
    I'm using the PHP markdown library: http://michelf.com/projects/php-markdown/ and the Javascript markdown library: http://attacklab.net/showdown/ I want to disallow all HTML, both the versions of markdown seem to allow it indiscriminately. My first attempt was simply to escape all html entities before feeding into markdown. However this also escapes the <hyperlink> and <email> syntax, which is very useful. I'd like to escape all HTML (not remove) but preserve all markdown syntax.

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  • Appending to InnerHtml without rest of contents flicking

    - by centro
    I have a div element with some formatted images. On user request, I load additional images asynchronously, without postback, and append the result (formatted HTML for new images) to the div element using JavaScript: function onRequestComplete(result) { var images = document.getElementById('images'); images.InnerHtml += result; } All is okay, except that part when images in the panel loaded previously flicker after the HTML is appended. As far I understand, the panel is reconstructed, not just new HTML is appended to its bottom. So it isn't web 2.0 behavior. How can it be done without flicking? Thanks in advance.

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  • Does .live() binding work for jQuery in IE7?

    - by Steve
    Hi everyone, I have a piece of javascript which is supposed to latch onto a form which gets introduced via XHR. It looks something like: $(document).ready(function() { $('#myform').live('submit', function() { $(foo).appendTo('#myform'); $(this).ajaxSubmit(function() { alert("HelloWorld"); }); return false; }); }); This happens to work in FF3, but not in IE7. Any idea what the problem is?

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  • Removing object/array difference from different arrays [duplicate]

    - by Kay Singian
    This question already has an answer here: remove objects from array by object property 3 answers I have two JavaScript objects: object_1 = [ {'value': '9:00', 'text':'9:00 am', 'eventtime':'09:00:00' }, {'value': '9:30', 'text':'9:30 am', 'eventtime':'09:30:00' }, {'value': '10:00', 'text':'10:00 am', 'eventtime':'10:00:00' }, {'value': '10:30', 'text':'10:30 am', 'eventtime':'10:30:00' }, {'value': '11:00', 'text':'11:00 am', 'eventtime':'11:00:00' }, {'value': '11:30', 'text':'11:30 am', 'eventtime':'11:30:00' }, ]; object_2 = [ {'eventtime': '10:30:00'}, {'eventtime': '11:00:00'} ]; I want to remove the object in object_1 which has the same eventtime value and store it in a new array/object . Please help me do so, I cant find a solution to this. This will be the new array/object: object_new = [ {'value': '9:00', 'text':'9:00 am', 'eventtime':'09:00:00' }, {'value': '9:30', 'text':'9:30 am', 'eventtime':'09:30:00' }, {'value': '10:00', 'text':'10:00 am', 'eventtime':'10:00:00' }, {'value': '11:30', 'text':'11:30 am', 'eventtime':'11:30:00' }, ];

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  • how to detect an F5 refresh keypress event in jquery?

    - by chaonextdoor
    I noticed that jquery has a keypress function. But it seems that it can only detect keypress event of numbers and characters. It cannot detect the F5 keypress event. And What surprises me the most is everyone online says that the keyCode of F5 is 116, But when I use the jquery keypress function, it just shows that the character t has the keyCode of 116(it seems that 116 is the ascii code of lowercase t)! Can somebody give me any idea about this and how to detect the F5 event in javascript or jquery? Thanks so much in advance.

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  • Can I improve my validation?

    - by Qmal
    So I want to validate my form using jQuery, this is how I imagine it and it works, but is the best method of doing it and maybe I can do it more effective with less code? <script type="text/javascript"> $(document).ready(function() { $("#frmCatAdd").submit(function() { var name = $("#edtName").val(); if (name == "") $("#edtName").css("border", "1px solid red") else $("#frmCatAdd").submit(); return false; }); }); </script>

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  • Hover multiple elements affecting only 1 item

    - by lilsizzo
    hi guys i was wondering if there is a way to hover a few elements with the same class name which is placed side by side and actions would be trigger upon leaving the area of the elements. For example : <div class="hoverme"></div> <div class="hoverme"></div> <div class="hoverme"></div> <div class="hoverme"></div> <div class="hoverme"></div> the javascript of "unhover" below should only be called when they leave the whole area of "hoverme" class. $('.hoverme').live('mouseover mouseout', function(event) { if (event.type == 'mouseover') { if(!$("#stage1 td").hasClass("hover")) { $("#stage1 td").addClass("hover",200) } } else { //$("#stage1 td").removeClass("hover",200) } }); Is there a way for this action??

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  • How to change a label's text after loading a html into a dialog

    - by Salsa
    I am opening a modal dialog by loading a form into it. After loading the form, I want to change it's title and one of it's fields' label. I can change the label's text, but after the function returns, the label's text turns back to it's original one. Is it possible to make this kind of change and if so, how? The HTML: <form action="testing.php" method="POST" id="example-form"> <fieldset> <label for="link" id="link-label"></label> </fieldset> </form> The javascript: $(".bt-example").button().click(function() { $('#example-dialog').load('form.html').dialog('open'); $('.ui-dialog-titlebar').text("THIS WORKS!"); $('#example-form #link-label').text("CHANGES AT FIRST, BUT GOES BLANK LATER"); $('#example-dialog').removeClass('invisible'); });

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  • Solution to grab text from page and display it elsewhere?

    - by GaryW
    I am trying to find a solution how to grab a text from one part of the page to be displayed on a different part of the same page (not stored). To explain this easier. I have this: <div id="test"> hello world </div> I want to grab the text "hello world" and display it somewhere else on the website as well. Im thinking that there might be a javascript code that could grab that specific div text? Any help would be very appreciated.

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  • get html content of next element with a defined classname

    - by Carasuman
    i have problems with jquery.. If i have this code to fill tooltip div <div id="tooltip"></div> <div class="tooltipMessage">Tooltip Message</div> <script type="text/javascript"> $("#id").html($("#tooltip").next(".tooltipMessage").html()); </script> Works, the code takes the next element with classname "tooltipMessage" and fills element with id "tooltip". But if i have this code: <div id="tooltip"></div> <p>other element</p> <div class="tooltipMesage">Tooltip Message</div> Returns "undefined". How i can take html from the next element with classname "tooltipMessage" if exists another element in middle ? Thanks for help!.

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  • Missing } in XML expression

    - by Chris
    I have an external javascript file that I want to, upon include, write some HTML to the end of the web page. Upon doing so though I get the error Missing } in XML expression on the line that uses dropdownhtml. Here is my code var dropdownhtml = '<div id="dropdown"></div>'; $(document).ready(function(){ //$(document).append(dropdownhtml); alert(dropdownhtml); }); Doing either append or alert throws up the same error, what is going wrong?

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  • quickflip + slideshow animation

    - by user288231
    I have been trying to integrate quickflip and a slideshow animation. So everytime when the user hovers over the image, it would pause the animation and "flip to the other side". When the user hovers out, it would then replace its normal state. The problem is here is I do not know how to handle the quickflip code (http://jonraasch.com/blog/quickflip-2-jquery-plugin). I have looked at the sample code and tried to replace it, but at the end the animations would get messed up... Javascript: var interval = setInterval( "slideSwitch()", 3000 ); $('.quickFlip').quickFlip(); $('#slideshow').hover(function () { clearInterval(interval); }, function () { interval = setInterval("slideSwitch()", 3000); });

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  • Accessing local variable doesn't improve performance

    - by NicMagnier
    The short version Why is this code: var index = (Math.floor(y / scale) * img.width + Math.floor(x / scale)) * 4; More performant than this one? var index = Math.floor(ref_index) * 4; The long version This week, the author of Impact js published an article about some rendering issue: http://www.phoboslab.org/log/2012/09/drawing-pixels-is-hard In the article there was the source of a function to scale an image by accessing pixels in the canvas. I wanted to suggest some traditional ways to optimize this kind of code so that the scaling would be shorter at loading time. But after testing it my result was most of the time worst that the original function. Guessing this was the JavaScript engine that was doing some smart optimization I tried to understand a bit more what was going on so I did a bunch of test. But my results are quite confusing and I would need some help to understand what's going on. I have a test page here: http://www.mx981.com/stuff/resize_bench/test.html jsPerf: http://jsperf.com/local-variable-due-to-the-scope-lookup To start the test, click the picture and the results will appear in the console. There are three different versions: The original code: for( var y = 0; y < heightScaled; y++ ) { for( var x = 0; x < widthScaled; x++ ) { var index = (Math.floor(y / scale) * img.width + Math.floor(x / scale)) * 4; var indexScaled = (y * widthScaled + x) * 4; scaledPixels.data[ indexScaled ] = origPixels.data[ index ]; scaledPixels.data[ indexScaled+1 ] = origPixels.data[ index+1 ]; scaledPixels.data[ indexScaled+2 ] = origPixels.data[ index+2 ]; scaledPixels.data[ indexScaled+3 ] = origPixels.data[ index+3 ]; } } jsPerf: http://jsperf.com/so-accessing-local-variable-doesn-t-improve-performance One of my attempt to optimize it: var ref_index = 0; var ref_indexScaled = 0 var ref_step = 1 / scale; for( var y = 0; y < heightScaled; y++ ) { for( var x = 0; x < widthScaled; x++ ) { var index = Math.floor(ref_index) * 4; scaledPixels.data[ ref_indexScaled++ ] = origPixels.data[ index ]; scaledPixels.data[ ref_indexScaled++ ] = origPixels.data[ index+1 ]; scaledPixels.data[ ref_indexScaled++ ] = origPixels.data[ index+2 ]; scaledPixels.data[ ref_indexScaled++ ] = origPixels.data[ index+3 ]; ref_index+= ref_step; } } jsPerf: http://jsperf.com/so-accessing-local-variable-doesn-t-improve-performance The same optimized code but with recalculating the index variable each time (Hybrid) var ref_index = 0; var ref_indexScaled = 0 var ref_step = 1 / scale; for( var y = 0; y < heightScaled; y++ ) { for( var x = 0; x < widthScaled; x++ ) { var index = (Math.floor(y / scale) * img.width + Math.floor(x / scale)) * 4; scaledPixels.data[ ref_indexScaled++ ] = origPixels.data[ index ]; scaledPixels.data[ ref_indexScaled++ ] = origPixels.data[ index+1 ]; scaledPixels.data[ ref_indexScaled++ ] = origPixels.data[ index+2 ]; scaledPixels.data[ ref_indexScaled++ ] = origPixels.data[ index+3 ]; ref_index+= ref_step; } } jsPerf: http://jsperf.com/so-accessing-local-variable-doesn-t-improve-performance The only difference in the two last one is the calculation of the 'index' variable. And to my surprise the optimized version is slower in most browsers (except opera). Results of personal testing (not the jsPerf tests): Opera Original: 8668ms Optimized: 932ms Hybrid: 8696ms Chrome Original: 139ms Optimized: 145ms Hybrid: 136ms Safari Original: 433ms Optimized: 853ms Hybrid: 451ms Firefox Original: 343ms Optimized: 422ms Hybrid: 350ms After digging around, it seems an usual good practice is to access mainly local variable due to the scope lookup. Because The optimized version only call one local variable it should be faster that the Hybrid code which call multiple variable and object in addition to the various operation involved. So why the "optimized" version is slower? I thought that it might be because some JavaScript engine don't optimize the Optimized version because it is not hot enough but after using --trace-opt in chrome, it seems all version are properly compiled by V8. At this point I am a bit clueless and wonder if somebody would know what is going on? I did also some more test cases in this page: http://www.mx981.com/stuff/resize_bench/index.html

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  • How to search and validate plain texts (where it starts with http AND ends with .aspx) to be a valid hyperlink in a page body content?

    - by syntaxcode
    My web page content is populated by a plain text that is retrieved from a CDATA format - plain text data. This is the site http://checksite.apsx to get information. For more information, visit http://moresites.com/FAQ/index.html or search the site. Now, my goal is to convert this plain text to a valid hyperlinks. I've used a javascript code that does the conversion - /((http|https|ftp):\/\/[^ ]+)/g; , but sometimes if there are multiple words, it captures an invalid URL. My question: Is there a way to strictly capture any string that starts with "http" AND ends with ".html" or "aspx" will be converted into a valid hyperlink? it should look like this - This is the site http://checksite.apsx to get information. For more information, visit http://moresites.com/FAQ/index.html or search the site.

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  • Jquery plugin for getting changes in textarea and sending them to server

    - by user763410
    I am getting a file "abc.txt" from server and dispaying it in a text area for editing. <div id="filecontents"> <textarea> CONTENTS OF FILE LARGER THAN 10KB </textarea> </div> The contents of the file are potentially large. The user will edit the textarea and add/delete text from any part(not just the end). I want to send ONLY the changes to the server for patching. How do I accomplish this?. Is there a javascript version of the popular linux command(diff). John Resig's diff code may not work as, for me, it will involve additional parsing on server side. Thanks!

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  • call .js file after ajax load

    - by asovgir
    I am trying to apply a .js file to a page I loaded via ajax (since ajax automatically strips the content of all the javascript). var url; var textUrl = 'local/file.js'; $('a').click(function() { url = $(this).attr('href'); $('.secondaryDiv').load(url, function() { $.getScript(textUrl, function(data, textStatus, jqxhr) { console.log(data); //data returned from getScript console.log(textStatus); //return "success" console.log(jqxhr.status); //200 }); }); return false; }); Am I approaching this the right way? I tried everything I could think of and I can't get it to work

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  • Preventing user from inserting *

    - by user990635
    I'm trying to prevent user from inserting * in a textbox. This is what I was trying to do, but here it only detects * if this is the only inserted character. For example texts like: *, etc. When allowed characters are mixed with *, then it cannot detect it. For example inputs such as: *hjh, etc.. and maybe how to make it replace only * with "" and not the whole field? <script type="text/javascript"> function testField(field) { var regExpr = new RegExp("[^*]"); if(!regExpr.test(field.value)) { field.value = ""; } } </script> <input type="text" id="searchGamesKeyword" class="searchGamesTextBox" name="searchGamesKeyword" onblur="testField(this);" />

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