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  • After Effect - Triangle Wave (JavaScript)

    - by PJ Palomaki
    Hi, I'm trying to control a parameter with AE expressions and I need a triangle wave. I've got this so far: freq = 20; amplitude = 8; m = amplitude; i = time*freq; m - (i % (2*m) - m); Unfortunately this gives a saw wave (see below) and my math's a bit rusty, any takers? Thanks! PJ http://i25.photobucket.com/albums/c73/pjburnhill/Screenshot2010-04-09at153815.png

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  • Javascript: Calling a function written in an anonymous function from String with the function's name

    - by Kai barry yuzanic
    Hello. I've started using jQuery and am wondering how to call functions in an anonymous function dynamically from String. Let's say for instance, I have the following functions: function foo() { // Being in the global namespace, // this function can be called with window['foo']() alert("foo"); } jQuery(document).ready(function(){ function bar() { // How can this function be called // by using a String of the function's name 'bar'?? alert("bar"); } // I want to call the function bar here from String with the name 'bar' } I've been trying to figure out what could be the counterpart of 'window', which can call functions from the global namespace such as window["foo"]. In the small example above, how I can call the function bar from a String "bar"? Thank you for your help.

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  • Using a C#.net DLL in Node.js / serverside javascript

    - by Dve
    I have spent a while playing with node.js and exploring related frameworks such as express and geddy... and I am very impressed, especially with the WebSockets implementation in socket.io. I have a pet project that is an online game, the entire game engine is written in C# and I would like to know if there is anyway I can call the functions of this existing dll from a solution built using node.js, socket.io, express etc? The game engine itself is pretty complete; tested and robust. I am hoping there is some neat way of exposing its functionality without to much overhead. Thanks

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  • JavaScript call to page method: error 500. JSON

    - by Ryan Ternier
    I'm using the auto complete control here:http://www.ramirezcobos.com/labs/autocomplete-for-jquery-js/comment-page-2/ And i've modified it as: var json_options; json_options = { script:'ReportSearch.aspx/GetUserList?json=true&limit=6&', varname:'input', json:true, shownoresults:true, maxresults:16, callback: function (obj) { $('#json_info').html('you have selected: '+obj.id + ' ' + obj.value + ' (' + obj.info + ')'); } }; $('#ctl00_contentModule_txtJQuerySearch').autoComplete(json_options); I have the following method in C# Code behind (aspx.cs) [System.Web.Services.WebMethod] [System.Web.Script.Services.ScriptMethod] public static string[] GetUserList(string input) { List<string> lUsers = new List<string>(); Server.DAL.SQLServer2005.User user = new Server.DAL.SQLServer2005.User(); Server.Info.AuthUser aUser = (Server.Info.AuthUser)HttpContext.Current.Session["AuthUser"]; List<Server.Info.User.UserDetails> users = user.GetUserList(aUser, input, 16, true); users.ForEach(delegate(ReportBeam.Server.Info.User.UserDetails u) { lUsers.Add("(" + u.UserName + ")" + u.LastName + ", " + u.FirstName); }); return lUsers.ToArray(); } The error I get back is: Server Error in '/WebPortal4' Application. Unknown web method GetUserList. Parameter name: methodName If I change any of the paraemeter names I get an error telling me the paremeter names are not in match. now that everything is as it should, it's bombing. Any help would rock.

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  • How to refactor this Javascript anonymous function?

    - by HeavyWave
    We have this anonymous function in our code, which is part of the jQuery's Ajax object parameters and which uses some variables from the function it is called from. this.invoke = function(method, data, callback, error, bare) { $.ajax({ success: function(res) { if (!callback) return; var result = ""; if (res != null && res.length != 0) var result = JSON2.parse(res); if (bare) { callback(result); return; } for (var property in result) { callback(result[property]); break; } } }); } I have omitted the extra code, but you get the idea. The code works perfectly fine, but it leaks 4 Kbs on each call in IE, so I want to refactor it to turn the anonymous function into a named one, like this.onSuccess = function(res) { .. }. The problem is that this function uses variables from this.invoke(..), so I cannot just take it outside of its body. How do I correctly refactor this code, so that it does not use anonymous functions and parent function variables?

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  • Create a permalink with Javascript

    - by Jon Romero
    I have a textbox where a user puts a string like this: "hello world! I think that __i__ am awesome (yes I am!)" I need to create a correct url like this: hello-world-i-think-that-i-am-awesome-yes-i-am How can be done using reg expressions? Also, is it possible to do it with Greek (for example)? "Ge?a s?? ??sµe" turns to geia-sou-kosme In other programming languages (python/ruby) I am using a translation array. Should I do the same here?

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  • Misunderstanding I have about javascript prototype inheritance

    - by Ilya
    Simple questions. function p() { function A() { this.random = "random"; } A.prototype.newfunc = function(){ alert("5");} function B() { } B.prototype = new A(); var bObj = new B(); } Q1: When I set B's prototype, I don't get how B's prototype property will update when/if A's prototype is updated. I mean, to me it just inherits/copies all those properties. It's not like it's: B.prototype = A.prototype where B and A are one in the same. Q2: After A is being returned and intialized to the prototype object of B, how does JS know not to include that prototype property? What I mean is, we never have this type of situation occuring as the JS interpreter knows just to chop off the property of A's prototype: B.prototype = new A(); //any A object has an associated prototype object B.prototype.prototype;//after initialization we no longer have the separate prototype property of A

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  • "Permission denied to access property 'href' from a non-chrome context" in JavaScript and OpenLayers

    - by Mark Iliffe
    This is really two questions one leading into the other. Firstly what does 'Permission denied to access property 'href' from a non-chrome context' actually mean? Secondly I am using overlays in OpenLayers and wish to change the opacity of said layers, this is where this error is being thrown the code of which is here... <input id='opacity' value="1.0" onChange="changeOpacity()"> Of which changeOpacity() is the following function... function changeOpacity() { var newOpacity = parseFloat(OpenLayers.Util.getElement('opacity').value); newOpacity = Math.min(1.0, Math.max(0.1, newOpacity)); OpenLayers.Util.getElement('opacity').value = newOpacity; for (var i=0; i<images.length; i++) { layers[images[i]].setOpacity(newOpacity); } } which throws the error at "var href = originalElement.href;" here... function mD(e) { //what is originalElement/srcElement/originalTarget? var originalElement = e.srcElement || e.originalTarget; var href = originalElement.href; if (originalElement.nodeName == "A" && href.match("http://www.openstreetmap.org/browse/")) { href = href.replace('http://www.openstreetmap.org/browse/','http://www.openstreetmap.org/api/0.6/'); if (gml) { map.removeLayer(gml); } //$("status").innerHTML = 'loading'; } gml = new OpenLayers.Layer.GML("OSM", href, {format: OpenLayers.Format.OSM}); map.addLayer(gml); gml.preFeatureInsert = style_osm_feature; var sf = new OpenLayers.Control.SelectFeature(gml, {'onSelect': on_feature_hover}); map.addControl(sf); sf.activate(); return false; } } Any help/ideas is great appreciated! I am using firefox 3.5.9 and firebug 1.5.4

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  • javascript: detect if XP or Classic windows theme is enabled

    - by mkoryak
    Is there any way to detect which windows XP theme is in use? I suspect that there is no specific api call you can make, but you may be able to figure it out by checking something on some DOM element, ie feature detection. Another question: does the classic theme even exist on windows vista or windows 7? edit - this is my solution: function isXpTheme() { var rgb; var map = { "rgb(212,208,200)" : false, "rgb(236,233,216)" : true }; var $elem = $("<button>"); $elem.css("backgroundColor", "ButtonFace"); $("body").append($elem); var elem = $elem.get(0); if (document.defaultView && document.defaultView.getComputedStyle) { s = document.defaultView.getComputedStyle(elem, ""); rgb = s && s.getPropertyValue("background-color"); } else if (elem.currentStyle) { rgb = (function (el) { // get a rgb based color on IE var oRG =document.body.createTextRange(); oRG.moveToElementText(el); var iClr=oRG.queryCommandValue("BackColor"); return "rgb("+(iClr & 0xFF)+","+((iClr & 0xFF00)>>8)+","+ ((iClr & 0xFF0000)>>16)+")"; })(elem); } else if (elem.style["backgroundColor"]) { rgb = elem.style["backgroundColor"]; } else { rgb = null; } $elem.remove(); rgb = rgb.replace(/[ ]+/g,"") if(rgb){; return map[rgb]; } } Next step is to figure out what this function returns on non-xp machines and/or figure out how to detect windows boxes. I have tested this in windows XP only, so vista and windows 7 might give different color values, it should be easy to add though. Here is a demo page of this in action: http://programmingdrunk.com/current-projects/isXpTheme/

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  • basic javascript question on geolocation and googlemaps

    - by ade
    hello all, Im hoping that somebody can help me out on what i feel is an easy answer but I just cant get it to work out. Im trying to trap the geolocation lat and long and place it into the google maps api so far i have var myOptions = { zoom:7, trips:1, mapTypeId: google.maps.MapTypeId.ROADMAP } var map = new google.maps.Map(document.getElementById("map"), myOptions); directionsDisplay.setMap(map); var request = { origin: 'newyork' destination: 'deleware', travelMode: google.maps.DirectionsTravelMode.DRIVING }; this works fine for what i want. how ever I want to be able to change Origin to the users lat long using the following script from google.maps.api. their code is: if(navigator.geolocation) { navigator.geolocation.getCurrentPosition(function(position) { initialLocation = new google.maps.LatLng(position.coords.latitude,position.coords.longitude); var placeMarker = new google.maps.Marker({ position: initialLocation, map: map, }); map.setCenter(initialLocation); }, function() { handleNoGeolocation(browserSupportFlag); }); } else { // Browser doesn't support Geolocation handleNoGeolocation(); } function handleNoGeolocation() { initialLocation = newyork; map.setCenter(initialLocation); } I want to pull out the navigator.geolocation.getCurrentPosition(function(position) { initialLocation = new google.maps.LatLng(position.coords.latitude,position.coords.longitude); and allocate it two 2 varibles, myLat and myLong. I then want to be able to change my orignal script from var request = { origin: 'newyork' destination: 'deleware', travelMode: google.maps.DirectionsTravelMode.DRIVING }; to var request = { origin: myLat,myLong destination: 'deleware', travelMode: google.maps.DirectionsTravelMode.DRIVING }; Does this make sense..? Im currently having a pig with it and as im not a JS developer its what i think should be a simple bit of coding that im losing the battle with.. any thoughts..?

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  • javascript - shorten string to fit into a certain # of lines

    - by Mala
    Hi I have a string that must fit into a box, and must be at most 3 lines long. To shorten it, I plan to truncate it and end it with '...'. I could shorten it to a certain # of characters but if i make it look good with "wwwwwwwww [...] wwww" it won't look right with "iiiiiiiiiii [...] iiii". Is there some way I can shorten it by how much space the string would take up, as opposed to how many characters there are in a string without using a fixed-width font? Mala ps. Please no "simply create an image of '...' and overlay it over the end of the line" hacks or similar - I actually want to shorten the string to the appropriate length

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  • Javascript window.open firefox/chrome issue

    - by Adelave
    Hi, I've application to open popup window to print page. function printHTML(urlPath) { var printPopUp = window.open(urlPath,null,"height=600,width=777,status=yes,toolbar=no,menubar=no,location=no,scrollbars=yes"); printPopUp.print(); } This script is working fine in IE, but in firefox/chrome. print() function is overlapping window.open, as a result print dialog is showing first while screen is still loading. I need to close print dialog in order to render page properly then print manually. Please advise.

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  • Javascript, AJAX, Extend PHP Session Timeout, Bank Timeout

    - by Guhan Iyer
    Greetings, I have the following JS code: var reloadTimer = function (options) { var seconds = options.seconds || 0, logoutURL = options.logoutURL, message = options.message; this.start = function () { setTimeout(function (){ if ( confirm(message) ) { // RESET TIMER HERE $.get("renewSession.php"); } else { window.location.href = logoutURL; } }, seconds * 1000); } return this; }; And I would like to have the timer reset where I have the comment for RESET TIMER HERE. I have tried a few different things to no avail. Also the code calling this block is the following: var timer = reloadTimer({ seconds:20, logoutURL: 'logout.php', message:'Do you want to stay logged in?'}); timer.start(); The code may look familiar as I found it on SO :-) Thanks!

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  • jQuery Javascript array 'contains' functionality?

    - by YourMomzThaBomb
    I'm trying to use the jQuery $.inArray function to iterate through an array and if there's an element whose text contains a particular keyword, remove that element. $.inArray is only returning the array index though if the element's text is equal to the keyword. For example given the following array named 'tokens': - tokens {...} Object [0] "Starbucks^25^http://somelink" String [1] "McDonalds^34^" String [2] "BurgerKing^31^https://www.somewhere.com" String And a call to removeElement(tokens, 'McDonalds'); would return the following array: - tokens {...} Object [0] "Starbucks^25^http://somelink" String [1] "BurgerKing^31^https://www.somewhere.com" String I'm guessing this may be possible using the jQuery $.grep or $.each function, or maybe regex. However, I'm not familiar enough with jQuery to accomplish this. Any help would be appreciated!

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  • javascript form validation - positioning

    - by Holian
    Dear Masters! I have little snippet for validatin' my form. I need help to position the error messages, because now all message appear in the filed, so the user can't see it, and so its very annoying. $(document).ready(function() { jQuery.validator.addMethod("lettersonly", function(value, element) { return this.optional(element) || /^[a-zoöüóúéáuí ]+$/i.test(value); }, "<?php echo $lettersonly; ?>"); $("#regval").validate({ rules: { name: { required: true, minlength: 5, maxlength:30, lettersonly: true }, nick: { required: true, minlength: 3, maxlength:12 }, pass1: { required: true, minlength: 5 }, pass2: { required: true, minlength: 5, equalTo: "#pass1" }, messages: { full: { required: ".....", minlength: "....", maxlength: "...." }, nick: { required: "....", minlength: "....", maxlength: "...." }, pass1: { required: "....", minlength: "..." }, pass2: { required: "....", minlength: "....", equalTo: "...." }, }); }); </script>

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  • Designing a fluid Javascript interface to abstract away the asynchronous nature of AJAX

    - by Anurag
    How would I design an API to hide the asynchronous nature of AJAX and HTTP requests, or basically delay it to provide a fluid interface. To show an example from Twitter's new Anywhere API: // get @ded's first 20 statuses, filter only the tweets that // mention photography, and render each into an HTML element T.User.find('ded').timeline().first(20).filter(filterer).each(function(status) { $('div#tweets').append('<p>' + status.text + '</p>'); }); function filterer(status) { return status.text.match(/photography/); } vs this (asynchronous nature of each call is clearly visible) T.User.find('ded', function(user) { user.timeline(function(statuses) { statuses.first(20).filter(filterer).each(function(status) { $('div#tweets').append('<p>' + status.text + '</p>'); }); }); }); It finds the user, gets their tweet timeline, filters only the first 20 tweets, applies a custom filter, and ultimately uses the callback function to process each tweet. I am guessing that a well designed API like this should work like a query builder (think ORMs) where each function call builds the query (HTTP URL in this case), until it hits a looping function such as each/map/etc., the HTTP call is made and the passed in function becomes the callback. An easy development route would be to make each AJAX call synchronous, but that's probably not the best solution. I am interested in figuring out a way to make it asynchronous, and still hide the asynchronous nature of AJAX.

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  • Javascript onscroll and mouse position

    - by EddyR
    I have a script that runs a addEventListener for onmousemove and onscroll on the document body to get the cursor position. A onmousemove event works fine (client + scroll), however when a onscroll event occurs clientX/Y seems to inherit scrollTop/Left values instead (only scroll). Is there a way around this? clickDocument = (document.documentElement != undefined && document.documentElement.clientHeight != 0) ? document.documentElement : document.body; var posx = 0; var posy = 0; if (e.pageX || e.pageY) { posx = e.pageX; posy = e.pageY; } else if (e.clientX || e.clientY) { posx = e.clientX; posy = e.clientY; } var scrollx = window.pageXOffset == undefined ? clickDocument.scrollLeft : window.pageXOffset; var scrolly = window.pageYOffset == undefined ? clickDocument.scrollTop : window.pageYOffset;

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  • Understanding try..catch in Javascript

    - by user295189
    I have this try and catch problem. I am trying to redirect to a different page. But sometimes it does and some times it doesnt. I think the problem is in try and catch . can someone help me understand this. Thanks var pg = new Object(); var da = document.all; var wo = window.opener; pg.changeHideReasonID = function(){ if(pg.hideReasonID.value == 0 && pg.hideReasonID.selectedIndex > 0){ pg.otherReason.style.backgroundColor = "ffffff"; pg.otherReason.disabled = 0; pg.otherReason.focus(); } else { pg.otherReason.style.backgroundColor = "f5f5f5"; pg.otherReason.disabled = 1; } } pg.exit = function(pid){ try { if(window.opener.hideRecordReload){ window.opener.hideRecordReload(pg.recordID, pg.recordTypeID); } else { window.opener.pg.hideRecord(pg.recordID, pg.recordTypeID); } } catch(e) {} try { window.opener.pg.hideEncounter(pg.recordID); } catch(e) {} try { window.opener.pg.hideRecordResponse(pg.hideReasonID.value == 0 ? pg.otherReason.value : pg.hideReasonID.options[pg.hideReasonID.selectedIndex].text); } catch(e) {} try { window.opener.pg.hideRecord_Response(pg.recordID, pg.recordTypeID); } catch(e) {} try { window.opener.pg.hideRecord_Response(pg.recordID, pg.recordTypeID); } catch(e) {} try { window.opener.window.parent.frames[1].pg.loadQualityMeasureRequest(); } catch(e) {} try { window.opener.pg.closeWindow(); } catch(e) {} parent.loadCenter2({reportName:'redirectedpage',patientID:pid}); parent.$.fancybox.close(); } pg.hideRecord = function(){ var pid = this.pid; pg.otherReason.value = pg.otherReason.value.trim(); if(pg.hideReasonID.selectedIndex == 0){ alert("You have not indicated your reason for hiding this record."); pg.hideReasonID.focus(); } else if(pg.hideReasonID.value == 0 && pg.hideReasonID.selectedIndex > 0 && pg.otherReason.value.length < 2){ alert("You have indicated that you wish to enter a reason\nnot on the list, but you have not entered a reason."); pg.otherReason.focus(); } else { pg.workin(1); var n = new Object(); n.noheaders = 1; n.recordID = pg.recordID; n.recordType = pg.recordType; n.recordTypeID = pg.recordTypeID; n.encounterID = request.encounterID; n.hideReasonID = pg.hideReasonID.value; n.hideReason = pg.hideReasonID.value == 0 ? pg.otherReason.value : pg.hideReasonID.options[pg.hideReasonID.selectedIndex].text; Connect.Ajax.Post("/emr/hideRecord/act_hideRecord.php", n, pg.exit(pid)); } } pg.init = function(){ pg.blocker = da.blocker; pg.hourglass = da.hourglass; pg.content = da.pageContent; pg.recordType = da.recordType.value; pg.recordID = parseInt(da.recordID.value); pg.recordTypeID = parseInt(da.recordTypeID.value); pg.information = da.information; pg.hideReasonID = da.hideReasonID; pg.hideReasonID.onchange = pg.changeHideReasonID; pg.hideReasonID.tabIndex = 1; pg.otherReason = da.otherReason; pg.otherReason.tabIndex = 2; pg.otherReason.onblur = function(){ this.value = this.value.trim(); } pg.otherReason.onfocus = function(){ this.select(); } pg.btnCancel = da.btnCancel; pg.btnCancel.tabIndex = 4; pg.btnCancel.title = "Close this window"; pg.btnCancel.onclick = function(){ //window.close(); parent.$.fancybox.close(); } pg.btnHide = da.btnHide; pg.btnHide.tabIndex = 3; pg.btnHide.onclick = pg.hideRecord; pg.btnHide.title = "Hide " + pg.recordType.toLowerCase() + " record"; document.body.onselectstart = function(){ if(event.srcElement.tagName.search(/INPUT|TEXT/i)){ return false; } } pg.workin(0); } pg.workin = function(){ var n = arguments.length ? arguments[0] : 1; pg.content.disabled = pg.hideReasonID.disabled = n; pg.blocker.style.display = pg.hourglass.style.display = n ? "block" : "none"; if(n){ pg.otherReason.disabled = 1; pg.otherReason.style.backgroundColor = "f5f5f5"; } else { pg.otherReason.disabled = !(pg.hideReasonID.value == 0 && pg.hideReasonID.selectedIndex > 0); pg.otherReason.style.backgroundColor = pg.otherReason.disabled ? "f5f5f5" : "ffffff"; pg.hideReasonID.focus(); } }

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  • Preferred method to reload page with JavaScript?

    - by Mel
    Hey Guys, which way to reload a current page (using a button) would you prefer? <input type="button" value="Reload" onClick="history.go(0)"> <input type="button" value="Reload" onClick="location.reload(true)"> <input type="button" value="Reload" onClick="window.location.reload(true)"> <input type="button" value="Reload" onClick="window.location.href=window.location.href"> <input type="button" value="Reload" onClick="document.location.reload(true)"> <input type="button" value="Reload" onClick="document.location.href=document.location.href"> As the URL of the page changes frequently AFAIK a 'fallback function' like <a href="urlOfCurrentPage.html" onclick="window.location.reload(true);return false;">Reload</a> won't work for me, right?

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  • javascript - document.activeElement

    - by Fernando SBS
    Hello, I have a few inputTextBoxes and I'm using document.activeElement to handle value changes of those inputboxes called by "change()" function of inputBox element. the problem is when I change the value of one of the inputboxes and then click in another inputbox... the function will get the document.activeElement of the new inputbox and will not work... how to make the function "know" that the one that changed was the previous one?

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