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  • How to use visibilitychange event on Firefox Extensions

    - by Tom S.
    I'm trying to learn how to make a firefox extension. I want to create a toolbar that only shows up on a specific page. I can make the toolbar appear, but then it should become hidden when I open or switch to a new tab, or close the tab with that specific page. I don't understand how to make the visibilitychange event work though, no matter what I try nothing happens. window.addEventListener("load", function load(event){ window.removeEventListener("load", load, false); myExtension.init(); },false); var myExtension = { init: function (aEvent) { gBrowser.addEventListener("DOMContentLoaded", this.showToolbar, false); }, showToolbar: function(aEvent) { var doc = aEvent.originalTarget; if(doc.location.href=="http://www.google.ca/"){ eToolbar=document.getElementById("nav-toolbar"); eToolbar.hidden=false; //no matter how I change this line below it never does anything gBrowser.addEventListener("mozvisibilitychange", this.toggleToolbar, false); } }, toggleToolbar: function(aEvent) { eToolbar=document.getElementById("nav-toolbar"); if(document["mozVisibilityState"]=="mozHidden"){ eToolbar.hidden=true; } else { eToolbar.hidden=false; } } }

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  • Best Practices for Sanitizing SQL inputs Using JavaScript?

    - by Greg Bulmash
    So, with HTML5 giving us local SQL databases on the client side, if you want to write a select or insert, you no longer have the ability to sanitize third party input by saying $buddski = mysql_real_escape_string($tuddski) because the PHP parser and MySQL bridge are far away. It's a whole new world of SQLite where you compose your queries and parse your results with JavaScript. But while you may not have your whole site's database go down, the user who gets his/her database corrupted or wiped due to a malicious injection attack is going to be rather upset. So, what's the best way, in pure JavaScript, to escape/sanitize your inputs so they will not wreak havoc with your user's built-in database? Scriptlets? specifications? Anyone?

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  • how to use web api with javascript/php?

    - by fayer
    geonames.org got a web api you can use to get all the hierarchy for a city. you just enter the id and you will get the data back in xml. http://ws.geonames.org/hierarchy?geonameId=2657896 i wonder how you fetch the url with php and javascript, and which one should i use. cause the id's are in the mysql database. i will get them with php. should i use file_get_contents, curl or fopen? and what function in javascript? jquery $.post? heard that it can only access localhost. would be great with some guidance here and even better with some code examples. thanks!

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  • Javascript Bookmarklet fails in IE8

    - by songdogtech
    Anyone want to take a stab at why this bookmarklet fails in IE8? It turns all text uppercase in Friefox and Safari. But in IE8, it simply stalls with "loading..." I've enabled scriplets and the security settings in IE8. Update 3/13/10: I've discovered that IE limits the data length of Favorites, so I need to find a work around to prevent IE from truncating the bookmarklet. javascript: (function(){ var i,t,D=document; for(i=0;t=D.getElementsByTagName('textarea')[i];++i) t.value=t.value.toUpperCase(); var newSS,styles='*{text-transform:uppercase}input,textarea{text-transform:none}'; if(D.createStyleSheet){ D.createStyleSheet("javascript:'"+styles+"'"); } else{ newSS=D.createElement('link'); newSS.rel='stylesheet'; newSS.href='data:text/css,'+escape(styles); D.documentElement.childNodes[0].appendChild(newSS); } } )()

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  • ActiveXObject issue in javaScript

    - by shan.swf
    hi.. I wrote a javascript function in my html page to execute an .exe file. for this i used ActiveXObject. my function is: //~~~~~~~~~~~~~~~~~~~~~~~~~~~JavaScript~~~~~~~~~~~~~~~~ function openWin(url) { if (!document.all) { alert ("Available only with Internet Explorer."); return; } var ws = new ActiveXObject("WScript.Shell"); ws.Exec(url); } //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ It works fine but there is a alert "An ActiveX control might be unsafe to interact with other parts of the page. Do you want to allow this interaction?" comes up to confirm. If i say YES only it will get loaded. Pls anyone help me on this how to avoid this pop-up coming every time when i reload my html page.

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  • My Javascript Object is too big

    - by Kubi
    I am creating a really big javascript object on page load. I am getting no error on firefox but on Internet Explorer I am getting an error saying that- Stop running this script ? A script on this page is causing your web browser to run slowly. If it continues to run, your computer might become unresponsive. Is there any size limit for Javascript objects in Internet Explorer ? Any other solutions but not dividing the object ? Any help would be greatly appreciated,

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  • My Javascript Object is too big

    - by Kubi
    I am creating a really big javascript object on page load. I am getting no error on firefox but on Internet Explorer I am getting an error saying that- Stop running this script ? A script on this page is causing your web browser to run slowly. If it continues to run, your computer might become unresponsive. Is there any size limit for Javascript objects in Internet Explorer ? Any other solutions but not dividing the object ? Any help would be greatly appreciated,

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  • Dojo: dojo onblur events

    - by Jane Wilkie
    Hi guys, I have a form setup with dojo 1.5. I am using a dijit.form.ComboBox and a dijit.form.TextBox The Combobox has values like "car","bike","motorcycle" and the textbox is meant to be an adjective to the Combobox. So it doesn't matter what is in the Combobox but if the ComboBox does have a value then something MUST be filled in the TextBox. Optionally, if nothing is in the ComboBox, then nothing can be in the TextBox and that is just fine. In fact if something isn't in the Combobox then nothing MUST be in the text box. In regular coding I would just use an onBlur event on the text box to go to a function that checks to see if the ComboBox has a value. I see in dojo that this doesn't work... Code example is below... Vehicle: <input dojoType="dijit.form.ComboBox" store="xvarStore" value="" searchAttr="name" name="vehicle_1" id="vehicle_1" /> Descriptor: <input type="text" dojoType="dijit.form.TextBox" value="" class=lighttext style="width:350px;height:19px" id="filter_value_1" name="filter_value_1" /> My initial attempt was to add an onBlur within the Descriptor's <input> tag but discovered that that doesn't work. How does Dojo handle this? Is it via a dojo.connect parameter? Even though in the example above the combobox has an id of "vehicle_1" and the text box has an id of "filter_value_1", there can be numerous comboboxes and textboxes numbering sequentially upward. (vehicle_2, vehicle_3, etc) Any advice or links to resources would be greatly appreciated. Janie

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  • How to determine direction of navigation from IE WebBrowser (IHtmlWindow2 or Javascript)

    - by Geoff Cox
    I'm uisng the WPF Web Browser control and when it fires the Navigating event, the event args always contain NavigationMode.New. It should be set to NavigationMode.Back if the user chooses to 'Go Back' from the web control. So its off to the COM ActiveX control underneath to determine the direction of navigation. I've been looking at IHtmlWindow2 and IHtmlDocument2 and IOmHistory, but don't see anything that happens on navigation to tell me if the navigation is caused by going back, forward, a new address, or a refresh. Since IHtmlWindow and Javascript have the same DOM, maybe someone knows how from Javascript. I've also been looking at the IWebBrowser2 interface, but can't find anything there either. Is there an event or property I need to inspect?

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  • Javascript draw dynamic line

    - by Ranch
    Hello, I'm looking for Javascript code for letting the user draw a line (on an image). Just as the line tool in Photoshop (for example): The user clicks on the image, drags the mouse (while the line between the start point and the mouse point is dynamically drawn on mouse drag). I would also need a callable function to send the page the start and end coordinates. I've found this very nice script for area selection: http://www.defusion.org.uk/code/javascript-image-cropper-ui-using-prototype-scriptaculous/ and I've found many script for drawing lines (and other shapes in JS), but could not find what I'm looking for. Thanks

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  • Disabling Submit Button in ASP.NET 3.5 Application with JavaScript breaks BlackBerry submission

    - by ahsteele
    The following code is being used to disable a Submit button once it has been clicked. This works great on desktop browsers and most BlackBerry mobile browsers. Submit.Attributes.Add("onclick", "javascript:this.disabled=true;" + ClientScript.GetPostBackEventReference(Submit, null)); Unfortunately, when using a BlackBerry Storm clicking the submit button causes the device to just reload the page. If I remove this code the Storm browser submits the page just fine. I need to disable the button when the browser is capable of doing so but do not want to affect browsers that are not JavaScript capable. I realize I could add the jQuery framework and only attach the event client side, but am trying to look for the simplest fix (read least intrusive) as this is a legacy application. Any suggestions?

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  • "Phased" execution of functions in javascript

    - by FK82
    Hey there! This is my first post on stackoverflow, so please don't flame me too hard if I come across like a total nitwit or if I'm unable ot make myself perfectly clear. :-) Here's my problem: I'm trying to write a javascript function that "ties" two functions to another by checking the first one's completion and then executing the second one. The easy solution to this obviously would be to write a meta function that calls both functions within it's scope. However, if the first function is asynchronous (specifically an AJAX call) and the second function requires the first one's result data, that simply won't work. My idea for a solution was to give the first function a "flag", i.e. making it create a public property "this.trigger" (initialized as "0", set to "1" upon completion) once it is called; doing that should make it possible for another function to check the flag for its value ([0,1]). If the condition is met ("trigger == 1") the second function should get called. The following is an abstract example code that I have used for testing: <script type="text/javascript" > /**/function cllFnc(tgt) { //!! first function this.trigger = 0 ; var trigger = this.trigger ; var _tgt = document.getElementById(tgt) ; //!! changes the color of the target div to signalize the function's execution _tgt.style.background = '#66f' ; alert('Calling! ...') ; setTimeout(function() { //!! in place of an AJAX call, duration 5000ms trigger = 1 ; },5000) ; } /**/function rcvFnc(tgt) { //!! second function that should get called upon the first function's completion var _tgt = document.getElementById(tgt) ; //!! changes color of the target div to signalize the function's execution _tgt.style.background = '#f63' ; alert('... Someone picked up!') ; } /**/function callCheck(obj) { //alert(obj.trigger ) ; //!! correctly returns initial "0" if(obj.trigger == 1) { //!! here's the problem: trigger never receives change from function on success and thus function two never fires alert('trigger is one') ; return true ; } else if(obj.trigger == 0) { return false ; } } /**/function tieExc(fncA,fncB,prms) { if(fncA == 'cllFnc') { var objA = new cllFnc(prms) ; alert(typeof objA + '\n' + objA.trigger) ; //!! returns expected values "object" and "0" } //room for more case definitions var myItv = window.setInterval(function() { document.getElementById(prms).innerHTML = new Date() ; //!! displays date in target div to signalize the interval increments var myCallCheck = new callCheck(objA) ; if( myCallCheck == true ) { if(fncB == 'rcvFnc') { var objB = new rcvFnc(prms) ; } //room for more case definitions window.clearInterval(myItv) ; } else if( myCallCheck == false ) { return ; } },500) ; } </script> The HTML part for testing: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/strict.dtd > <html> <head> <script type="text/javascript" > <!-- see above --> </script> <title> Test page </title> </head> <body> <!-- !! testing area --> <div id='target' style='float:left ; height:6em ; width:8em ; padding:0.1em 0 0 0; font-size:5em ; text-align:center ; font-weight:bold ; color:#eee ; background:#fff;border:0.1em solid #555 ; -webkit-border-radius:0.5em ;' > Test Div </div> <div style="float:left;" > <input type="button" value="tie calls" onmousedown="tieExc('cllFnc','rcvFnc','target') ;" /> </div> <body> </html> I'm pretty sure that this is some issue with javascript scope as I have checked whether the trigger gets set to "1" correctly and it does. Very likely the "checkCall()" function does not receive the updated object but instead only checks its old instance which obviously never flags completion by setting "this.trigger" to "1". If so I don't know how to address that issue. Anyway, hope someone has an idea or experience with this particular kind of problem. Thanks for reading! FK

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  • Accessing WebKit Devtools JavaScript library

    - by VLostBoy
    I noticed something in Chrome the other day- I had opened Developer Tools, and then hit view source and was initially surprised to notice that apparently the developer tools window is coded in HTML and JavaScript- you can see that by putting the following into the Chrome address bar: view-source:chrome://devtools/devtools.html Two things struck me- first, the codes copyright belongs to Apple (considering their backing of WebKit, thats not too surprising), and secondly, it appears that you cannot access the JavaScript, CSS or Image files directly through Chrome by clicking on links in the source code. So two questions: Where are the DevTools assets stored on my computer or how can I otherwise access them? Or even better, can someone identify the library that is used and let me know how its licensed? I'm always on the look out for a well implemented UI toolkit- and Devtools looks great.

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  • Javascript sleep

    - by fmsf
    Is any better way than this function to make a sleep in javascript, or should I just use that function? (taken from here) function pausecomp(millis) { var date = new Date(); var curDate = null; do { curDate = new Date(); } while(curDate-date < millis); } This is not a dupe of http://stackoverflow.com/questions/758688/sleep-in-javascript I want a real sleep in a middle of a function, not a delay for a piece of code;

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  • Call an anchor tag via javascript

    - by Fero
    Hi all, I am using thick box 3.1 to load a pop up. It working well by using in the following way: <a href="filename.php" class="thickbox"> TEST </a> If we click on the TEST now then the popup is working well and good. Now my prob is: I need to call this popup in form load using JavaScript. I do something like below: <script type="text/javascript"> window.location.href = "filename.php" </script> it's just redirecting to that particular file. But not showing in the pop up. What is the possible way? thanks in advance

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  • calling and killing a parent function with onmouseover and onmouseout events

    - by Zoolu
    I want to call the function upon the onmouseover="ParentFunction();" then kill it onmouseout="killParent();". Note: in my code the parent function is called initiate(); and the killer function is called reset(); which lies outside the parent function at the bottom of the script. I don't know how to kill the intitiate() function my first guess was: var reset = function(){ return initiate(); }; here's my source code: any suggestions and help appreciated. <!doctype html> <html> <head> <title> function/event prototype </title> <link rel="stylesheet" type="text/css" href="styling.css" /> </head> <body> <h2> <em>Fantastical place<br/>prototype</em> </h2> <div id="button-container"> <div id="button-box"> <button id="activate" onmouseover="initiate()" onmouseout="reset();" width="50px" height="50px" title="Activate"> </button> </div> <div id="text-box"> </div> </div> <div id="container"> <canvas id="playground" width="200px" height="250px"> </canvas> <canvas id="face" width="400px" height="200px"> </canvas> <!-- <div id="clear"> </div> --> </div> <script> alert("Welcome, there are x entries as of" +""+new Date().getHours()); //global scope var i=0; var c1 = []; //c is short for collect var c2 = []; var c3 = []; var c4 = []; var c5 = []; var c6 = []; var initiate = function(){ //the button that triggers the program var timer = setInterval(function(){clock()},90); //copy this block for ref. function clock(){ i+=1; var a = Math.round(Math.random()*200); var b = Math.round(Math.random()*250); var c = Math.round(Math.random()*200); var d = Math.round(Math.random()*250); var e = Math.round(Math.random()*200); var f = Math.round(Math.random()*250); c1.push(a); c2.push(b); c3.push(c); c4.push(d); c5.push(e); c6.push(f); // document.write(i); var c = document.getElementById("playground"); var ctx = c.getContext("2d"); ctx.beginPath(); ctx.moveTo(c3[i-2], c4[i-2]); ctx.bezierCurveTo(c1[i-2],c2[i-2],c5[i-2],c6[i-2],c3[i-1], c4[i-1]); // ctx.lineTo(c3[i-1], c4[i-1]); if(a<200){ ctx.strokeStyle="#FF33CC"; } else if(a<400){ ctx.strokeStyle="#FF33aa"; } else{ ctx.strokeStyle="#FF3388"; } ctx.stroke(); document.getElementById("text-box").innerHTML=i+"<p>Thoughts.</p>"; if(i===20){ //alert("15 reached"); clearInterval(timer);//to clearInterval must be using a global scoped variable. return; } }; //end of clock //setInterval(clock,150); var targetFace = document.getElementById("face"); var face = targetFace.getContext("2d"); var faceTimer = setInterval(function(){faceAnim()},80); //copy this block for ref. global scoped. function faceAnim(){ face.beginPath(); face.strokeStyle="#FF33CC"; face.moveTo(100,104); //eye line face.bezierCurveTo(150,125,250,125,300,104); face.moveTo(200,1); //centre line face.lineTo(200,400); face.moveTo(125,111);//left eye lid face.bezierCurveTo(160,135,170,130,185,120); face.moveTo(150,116);//left eye face.bezierCurveTo(155,125,165,125,170,118); face.moveTo(275,111);//right eye lid face.bezierCurveTo(240,135,230,130,215,120); face.moveTo(250,116);//right eye face.bezierCurveTo(245,125,235,125,230,118); face.moveTo(195, 118); //left nose face.lineTo(190, 160); face.lineTo(200,170); face.moveTo(190,160); //left nostroll face.lineTo(180,160); face.lineTo(191,154); face.moveTo(180,160); //left lower nostrol face.lineTo(200,170); face.moveTo(205, 118); //right nose face.lineTo(210, 160); face.lineTo(200,170); face.moveTo(210,160); //right nostroll face.lineTo(220,160); face.lineTo(209,154); face.moveTo(220,160); //right lower nostrol face.lineTo(200,170); face.moveTo(200,140); //outer triad face.lineTo(170, 100); face.lineTo(230, 100); face.lineTo(200, 140); face.moveTo(200,145); //outer triad drop shadow face.lineTo(170, 100); face.lineTo(230, 100); face.lineTo(200, 145); face.moveTo(200,130); //inner triad face.lineTo(180, 105); face.lineTo(220, 105); face.lineTo(200, 130); //face.lineWidth =0.6; face.moveTo(280,111);//outer right eye lid face.bezierCurveTo(240,140,230,135,210,120); face.moveTo(120,111);//outer left eye lid face.bezierCurveTo(160,140,170,135,190,120); face.moveTo(162,174); //upper mouth line face.bezierCurveTo(170,180,230,180,238,174); face.moveTo(165,175); //mouth line bottom face.bezierCurveTo(190,Math.floor(Math.random()*25+180),210,Math.floor(Math.random()*25+180),235,175); face.moveTo(232,204); //head shape face.lineTo(340, 20); face.moveTo(168,204); //head shape face.lineTo(60, 20); face.stroke(); //exicute all co-ords. }; //end of face anim var clearFace = function(){ document.getElementById('face').getContext('2d').clearRect(0, 0, 700, 750); }; setInterval(clearFace,90); }; //end of parent function var reset = function(){ document.getElementById('playground').getContext('2d').clearRect(0, 0, 700, 750); //clearInterval(faceTimer); //delete initiate(); }; </script> </body> </html>

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  • Facebook connect JavaScript with PHP

    - by skidding
    I'm using the JavaScript method to sync/login (with the popup) with Facebook Connect on my site, it seems to work. However, after I get logged in, I want to continue in backend, with the PHP library. I see the cookies are set by the JavaScript lib, but I don't know how to use them with the PHP api. I used $fb = new Facebook($api_key, $secret); $uid = $fb->get_loggedin_user(); but not user data is getting passed. How can I get the user data in PHP after I logged in in frontend? As far as I'm concerned, I would have gone PHP all the way, but I didn't manage to make the auth work, meaning that in never redirected me back to my site :). Thanks!

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  • detachEvent not working with named inline functions

    - by Polshgiant
    I ran into a problem in IE8 today (Note that I only need to support IE) that I can't seem to explain: detachEvent wouldn't work when using a named anonymous function handler. document.getElementById('iframeid').attachEvent("onreadystatechange", function onIframeReadyStateChange() { if (event.srcElement.readyState != "complete") { return; } event.srcElement.detachEvent("onreadystatechange", onIframeReadyStateChange); // code here was running every time my iframe's readyState // changed to "complete" instead of only the first time }); I eventually figured out that changing onIframeReadyStateChange to use arguments.callee (which I normally avoid) instead solved the issue: document.getElementById('iframeid').attachEvent("onreadystatechange", function () { if (event.srcElement.readyState != "complete") { return; } event.srcElement.detachEvent("onreadystatechange", arguments.callee); // code here now runs only once no matter how many times the // iframe's readyState changes to "complete" }); What gives?! Shouldn't the first snippet work fine?

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  • Alternative to jQuery's .toggle() method that supports eventData?

    - by Bungle
    The jQuery documentation for the .toggle() method states: The .toggle() method is provided for convenience. It is relatively straightforward to implement the same behavior by hand, and this can be necessary if the assumptions built into .toggle() prove limiting. The assumptions built into .toggle have proven limiting for my current task, but the documentation doesn't elaborate on how to implement the same behavior. I need to pass eventData to the handler functions provided to toggle(), but it appears that only .bind() will support this, not .toggle(). My first inclination is to use a flag global to a single handler function to store the click state. In other words, rather than: $('a').toggle(function() { alert('odd number of clicks'); }, function() { alert('even number of clicks'); }); do this: var clicks = true; $('a').click(function() { if (clicks) { alert('odd number of clicks'); clicks = false; } else { alert('even number of clicks'); clicks = true; } }); I haven't tested the latter, but I suspect it would work. Is this the best way to do something like this, or is there a better way that I'm missing? Thanks!

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  • endsWith in javascript

    - by Bobby Kumar
    How can I check if a string ends with a particular character in javascript? example I have a string say var str = "mystring#"; I want to know if that string str is ending with "#". How can I check it? is there a endsWith() method in javascript? one solution I have is take the length of the string and get the last character and check it. Is this the best way or there is any other way?

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  • null coalescing operator for javascript?

    - by Daniel Schaffer
    I assumed this question has already been asked here, but I couldn't find any, so here it goes: Is there a null coalescing operator in Javascript? For example, in C#, I can do this: String someString = null; var whatIWant = someString ?? "Cookies!"; The best approximation I can figure out for Javascript is using the conditional operator: var someString = null; var whatIWant = someString ? someString : 'Cookies!'; Which is sorta icky IMHO. Can I do better?

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