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  • What's faster to parse lots of data (5Mb): eval or json?

    - by AlfaTeK
    I want to get, via ajax, a collection of data objects and parse them into JS data. Currently I have 2 choices: - Server returns valid javascript code and then I eval it. - Server returns JSON object and then I eval the json object What is the fastest of these in Firefox? (I only care about the "parsing" performance, not server or data transfer)

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  • How to save svg canvas to local filesystem

    - by dr jerry
    Is there a way to allow a user, after he has created a vector graph on a javascript svg canvas using a browser, to download this file to their local filesystem? SVG is a total new field for me so please be patient if my wording is not accurate. kind regards, Jeroen.

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  • Dynamic positioning inside relative div

    - by ian
    I'm trying to get a color picker javascript widget working in a page with a bunch of "stuff" in it that I can't change. Some of the "stuff" is causing the color picker to appear well below the link when clicked. I've reduced it to a simple example below. <html> <head> <script type="text/javascript"> function setPos(aname,dname) { var o=document.getElementById(aname); var ol=o.offsetLeft; while ((o=o.offsetParent) != null) { ol += o.offsetLeft; } o=document.getElementById(aname); var ot=o.offsetTop + 25; while((o=o.offsetParent) != null) { ot += o.offsetTop; } document.getElementById(dname).style.left = ol + "px"; document.getElementById(dname).style.top = ot + "px"; } </script> <style> h1 {height: 50px;} #divMain {position: relative;} </style> </head> <body> <h1></h1> <div id="divMain"> <a href="#" onClick="setPos('link1','div1');return false;" name="link1" id="link1">link 1</a> <div id="div1" style="position:absolute;border-style:solid;left:200px;top:200px;">div 1</div> </div> </body> </html> What's supposed to happen is when you click "link 1", "div1" should move directly below "link 1". What actually happens is that "div 1" appears well below "link 1". If you remove position: relative; from the CSS definition for divMain, "div 1" is positioned correctly. How can I position "div 1" directly beneath "link 1" without removing position: relative;?

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  • CSS style info library

    - by Bobby Jack
    Is anyone aware of a good javascript library to obtain original (i.e. not computed) style for a given element in the DOM? In other words, something one could use to produce the results in Firebug's style tab. Like Firebug, it should take into account inheritance, shortcut properties, and all the other nuances of CSS.

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  • PHP Beginner: How to pass PHP variable from one PHP code segment to another ?

    - by Misha Moroshko
    I have index.php which uploads a file to server and sets several PHP variables (like $target_folder_and_file_name). index.php also has the following line (it was originally index.html): <script language="JavaScript" src="main.js.php"></script> After index.php returned to the browser, the browsers asks for main.js.php from the server (right?). Can I access somehow $target_folder_and_file_name from the PHP code in main.js.php ?

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  • Set Image Src to Local File

    - by cmessier
    I am writing a Firefox extension and would like the users to be able to change an image on a web page with a local image. Is it possible, using JavaScript, to change the image source with an image that is saved on the user's local machine? Let me know if you need more information. Thanks

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  • dotted stroke in <canvas>

    - by Sam
    I guess it is not possible to set stroke property such as CSS which is quite easy. With CSS we have dashed, dotted, solid but on canvas when drawing lines/or strokes this doesn't seem to be an option. How have you implemented this? I've seen some examples but they are really long for such a silly function. For example: http://groups.google.com/group/javascript-information-visualization-toolkit/browse_thread/thread/22000c0d0a1c54f9?pli=1

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  • How do I create an Array into another Array?

    - by Timnkd
    I have the following JavaScript Array: var jsonArray = { 'homes' : [ { "home_id":"203", "price":"925", "sqft":"1100", "num_of_beds":"2", "num_of_baths":"2.0", }, { "home_id":"59", "price":"1425", "sqft":"1900", "num_of_beds":"4", "num_of_baths":"2.5", }, // ... (more homes) ... ]} I want to convert this to the following type of Array (pseudo code): var newArray = new Array(); newArray.push(home_id's); How can I do that? Notice how the newArray only has home_ids from the big jsonArray array.

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  • div refresh without click of the button

    - by fusion
    how do i make the div refresh, say after 10 secs and execute the run_query() function without clicking on the button? <script src="scripts/ajax.js" type="text/javascript"></script> <div id="quote"><strong>Quote of the Day</strong></div> <div><a style="cursor:pointer" onclick="run_query()">Next quote …</a></div>

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  • Play audio file on hover

    - by powtac
    What is the best solution to play an audio file on mouse over via JavaScript? And stop it when the mouse leaves the link. jQuery is available. <a href="/test.mp3" class="play">play</a>

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  • Control characters as delimiters

    - by Gio Borje
    I have a nodejs TCP server and a client. Basic network communication happens. Client sends "data + STX_CHARACTER + data + ETX_CHARACTER" (just an example). How do I split the string using the STX Control Character as a delimiter or how do I reference the character at all in Javascript.

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  • How to access 'private functions' in a singleton from another object inside it.

    - by Cedric Dugas
    I am currently trying to create a test suite for my javascript apps. My problem is that, it seems I cannot get access to init() from my utils object, as you can see below: I have my app that follow a singleton pattern: var appModal = function () { var utils = Object.create(moduleUtils); function init(caller, options ) { } }(); My test suite is in moduleUtils, this is a object literal converted to a prototype moduleUtils.debug = { addSlideTest : function(){ /* this function cannot fire init() from appModal */ }}

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  • Hit detection on non-transparent pixel

    - by Abie
    Given a PNG in a web context with some transparent pixels and some non-transparent pixels, is there a way in Javascript to determine if a user has clicked on a non-transparent pixel? A webkit-only solution would be perfectly acceptable.

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  • Asp controls Id generation inside repeater

    - by toraan
    I define some controls inside repeater itemtemplate, the problem is with the Id that are generated automatically. This is my page: <asp:Repeater ID="rptThreads" runat="server" onitemcreated="rptThreads_ItemCreated"> <HeaderTemplate> <table cellpadding="0px" cellspacing="0"> </HeaderTemplate> <ItemTemplate> <tr style="height:50px"> <td> <asp:PlaceHolder ID="plcItemTitle" runat="server"> <asp:Panel id="titleContainer" runat="server" style="position:absolute;"> <asp:HyperLink ID="lnkTitle" runat="server" style="float:left;padding-right:10px;" Text='<%# Container.DataItem%>'/> <asp:Panel id="pnlEditButtons" runat="server" Visible="false" style="vertical-align:middle;z-index:100;display:none;float:left;" > <asp:ImageButton ID="imgbtn1" runat="server" ImageUrl="~/Images/misc/edit.png" /> <asp:ImageButton ID="imgbtn2" runat="server" ImageUrl="~/Images/misc/Rename.png" /> </asp:Panel> </asp:Panel> </asp:PlaceHolder> </td> </tr> </ItemTemplate> <FooterTemplate> </table> </FooterTemplate> </asp:Repeater> Now I will try to describe the problem: code-behind: protected void Page_Load(object sender, EventArgs e) { int [] array = {1,2,3,4,5}; rptThreads.DataSource = array; rptThreads.DataBind(); } protected void rptThreads_ItemCreated(object sender, RepeaterItemEventArgs e) { if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) { Panel editButtonsPanel = e.Item.FindControl("pnlEditButtons") as Panel; editButtonsPanel.Visible = true; Panel containerPanel = e.Item.FindControl("titleContainer") as Panel; //Point of Interest!!!! containerPanel.Attributes.Add("onmouseover", "ShowEditButtons('" + editButtonsPanel.ClientID + "');"); } } If I run the page as is, the generated html will be the following (I show only the first 2 items): <table cellpadding="0px" cellspacing="0"> <tr style="height:50px"> <td> <div id="titleContainer" onmouseover="ShowEditButtons('pnlEditButtons');" style="position:absolute;"> <a id="lnkTitle" style="float:left;padding-right:10px;">1</a> <div id="pnlEditButtons" style="vertical-align:middle;z-index:100;display:none;float:left;"> <input type="image" name="imgbtn1" id="imgbtn1" src="Images/misc/edit.png" style="border-width:0px;" /> <input type="image" name="imgbtn2" id="imgbtn2" src="Images/misc/Rename.png" style="border-width:0px;" /> </div> </div> </td> </tr> <tr style="height:50px"> <td> <div id="titleContainer" onmouseover="ShowEditButtons('pnlEditButtons');" style="position:absolute;"> <a id="lnkTitle" style="float:left;padding-right:10px;">2</a> <div id="pnlEditButtons" style="vertical-align:middle;z-index:100;display:none;float:left;"> <input type="image" name="imgbtn1" id="imgbtn1" src="Images/misc/edit.png" style="border-width:0px;" /> <input type="image" name="imgbtn2" id="imgbtn2" src="Images/misc/Rename.png" style="border-width:0px;" /> </div> </div> </td> </tr> As you can see all divs get the SAME ID, THIS I DONT WANT!!! But If I omit this line form the ItemCreated event: containerPanel.Attributes.Add("onmouseover", "ShowEditButtons('" + editButtonsPanel.ClientID + "');"); The generated HTML will be the following: <table cellpadding="0px" cellspacing="0"> <tr style="height:50px"> <td> <div id="rptThreads_ctl01_titleContainer" style="position:absolute;"> <a id="rptThreads_ctl01_lnkTitle" style="float:left;padding-right:10px;">1</a> <div id="rptThreads_ctl01_pnlEditButtons" style="vertical-align:middle;z-index:100;display:none;float:left;"> <input type="image" name="rptThreads$ctl01$imgbtn1" id="rptThreads_ctl01_imgbtn1" src="Images/misc/edit.png" style="border-width:0px;" /> <input type="image" name="rptThreads$ctl01$imgbtn2" id="rptThreads_ctl01_imgbtn2" src="Images/misc/Rename.png" style="border-width:0px;" /> </div> </div> </td> </tr> <tr style="height:50px"> <td> <div id="rptThreads_ctl02_titleContainer" style="position:absolute;"> <a id="rptThreads_ctl02_lnkTitle" style="float:left;padding-right:10px;">2</a> <div id="rptThreads_ctl02_pnlEditButtons" style="vertical-align:middle;z-index:100;display:none;float:left;"> <input type="image" name="rptThreads$ctl02$imgbtn1" id="rptThreads_ctl02_imgbtn1" src="Images/misc/edit.png" style="border-width:0px;" /> <input type="image" name="rptThreads$ctl02$imgbtn2" id="rptThreads_ctl02_imgbtn2" src="Images/misc/Rename.png" style="border-width:0px;" /> </div> </div> </td> </tr> All divs get unique IDs, and this I do want My questions are: 1)why it happens? why this line of code messup the ids? 2)how can have the unique ID's and assign javascript in codebehind? I can add this on aspx (it will wotk and I will get unique ids): onmouseover='<%# "javascript:ShowEditButtons(\""+ Container.FindControl("pnlEditButtons").ClientID+ "\");" %>' But I must do it in codebehind because I need to set the javascript only if server validate some things.

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