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• In Javascript, when is a new scope created? (with a new function and in a "with" statement) Are the

  - by Jian Lin

  In Javascript, when is a new scope created? The 2 situations I know of are: with a new function in a "with" statement as a note, any new block (in if-then-else, loops, or just beginning a block for no other reason) won't create a new scope. Is there a third situation where a new scope is created besides the two situations above? Thanks.

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• Detect when a new property is added to a Javascript object?

  - by UICodes

  A simple example using a built-in javascript object: navigator.my_new_property = "some value"; //can we detect that this new property was added? I don't want to constantly poll the object to check for new properties. Is there some type of higher level setter for objects instead of explicitly stating the property to monitor? Again, I don't want to detect if the property value changed, but rather when a new property is added. Ideas? thanks

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• What are the standard practices for throwing Javascript Exceptions?

  - by T.R.

  w3schools says that exceptions can be strings, integers, booleans, or objects, but the example given doesn't strike me as good practice, since exception type checking is done through string comparison. Is this the preferred method of exception handling in Javascript? Are there built-in exception types (like NullPointerException)? (if so, what are they, what kind of inheritance do they use, and are they preferred over other options?)

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• Any way to specify the base of math.log() in javascript?

  - by Ryan

  I need a log function in my javascript but it needs to be base 10, I can't see any listing for this so I'm assuming it's not possible... any math wizards out there know of an approach for this? Or maybe I'm missing something and there is a way?

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• single page javascript send data AND pull data from mysql via php?

  - by David19801

  Hi, I am trying to make a dynamic form which retrives data. How can I use javascript to load a value from a mysql database? I understand that it must use php in some way, and I know how to query the database and assign the value to a php variable, but I have no idea what to do after that...any advice? the goal is to have someone enter their orderid say, then the datbase auto pulls down and enters their last invoice in the field below it after they click GO...

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• JavaScript Replace - u0009 .... with .replace(/\u0009/g,'');

  - by nobosh

  I'd like to use Javascript to replace all instances of \u009 in a string This doesn't seem to be working: .replace(/\u0009/g,''); Do I need to escape something?

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• I ran out of available quote symbols in javascript!

  - by Chaotic_one

  I can't believe it, but this is really happening. I ran out of available quote symbols using jquery and javascript native functions together. Can somebody help? Maybe there is yet another symbol? var t=setTimeout('$("#popupChange").html('<img src="http://servername/pdf/picture/genericThrobber.gif" />');',2000);

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• How to get a webpage as plain text without any html using javascript?

  - by Amr ElGarhy

  i am trying to find a way using javascript or jquery to write a function which remove all the html tags from a page and just give me the plain text of this page. How this can be done? any ideas?

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• Javascript - Get callback info back to original calling function.

  - by Steve

  Let's say you have a Javascript function that calls a web service method. So that webservice completes and calls a callback function, which has the result. How do I get that result back into the original function that called the web service method? Essentially, I'm trying to "synchronize" an asynchronous call.

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• Is it posible to navigate swf file using javascript/jquery?

  - by ngkong

  When we open plain swf in browser, we are able to control the swf file by right clicking, the available control are: zoom in, zoom out, quality, rewind (previous frame), forward (next frame), and print. Is it possible to trigger those control using javascript especially jquery? Thanks.

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• How can I start a flash video from javascript?

  - by Geo

  Is it possible to start playing a file inside a flash player by making use of javascript code? If so, how would I do it?

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• Is it possible to run JavaScript before any image loads?

  - by Matrym

  Is it possible to run JavaScript before any image loads? Is this default behavior? Dom, script, IMG load?

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• How do you get the pageYOffset of from the bottom of the window and not the top ( Javascript )?

  - by user782860

  I need to get the pageYOffset of the bottom of the viewable area, whether the user is zoomed in on the webpage or not, on Mobile Safari ( iPhone ). However pageYOffset returns the offset from the upper left corner of the window. Spec: "pageYOffset properties returns the pixels the current document has been scrolled from the upper left corner of the window" How do you get the page y offset from the bottom of the viewable area, (zoomed in or not) on the iPhone via Javascript?

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• How to access parent iframe elements from a child javascript page?

  - by samir

  I have 2 pages-- Parent n child. In the parent page i have an iframe whose value i want to ftech in the javascript of child page. Is there any way?....Please suggest.

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• Can a PDF file's print dialog be opened with Javascript?

  - by user83358

  I know how to open a webpage in a new window and add javascript so the print dialog pops up. Is there a way to do a similar thing with a PDF file?

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• In Javascript, if there is an object with a lot of properties that are functions, how do you convert

  - by Jian Lin

  In Javascript, if an object has lots of properties that are functions: var obj = { foo: function() { ... }, bar: function() { ... }, ... } then how can you get an array of names of those functions? That is, an array ["foo", "bar", ... ] thanks.

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• Is it Possible to change the Default Margins of Browser through JavaScript???

  - by Govind Lohar

  I want to change the default margins of Browser through JavaScript because I want to print the displayed document on page but the margins are different on different browser??? plz help me to change default margins of browser. if you have any solution tell me.

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• How do you access @font-face in the DOM (via Javascript)?

  - by Jon Raasch

  Hi I'm looking to access @font-face with Javascript. I assume it's somewhere in the DOM but where? I want to do this for @font-face feature detection. Thanks!

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• What's the difference between $get and $find in JavaScript?

  - by RoboShop

  Hi, I'm a .NET programmer who've just started to learn more about client side scripting, and I was wondering sometimes you use $get('value') and $find('value') and I've discovered that these are just shortcuts for document.getElementById('value') and Sys.Application.findComponent('value'), respectively. However, I still don't understand: what is the difference between these two functions in JavaScript? What exactly are they looking up/retrieving when invoked? Thanks in advance.

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• How do I emulate pressing F-11 in a browser using Javascript?

  - by Itay Moav

  How do I emulate pressing F-11 in a browser using Javascript? (I assume it will be different in Chrome,IE and FF?)

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• How can I convert Excel VBA to Google spreadsheets Javascript API?

  - by Bearjcc

  I have recorded a macro in Excel, but I want to run this code in Google spreadsheets. I do not know how to program in either code. How do I convert them? I tried an online VB to Javascript converter, but this does not work with VBA.

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• what should be the good approach to write javascript code?

  - by Bhupi

  Hi, which should be the good approach to write javascript code and why? 1) var myClass = function(){} myClass.prototype.init = function(x, y){ this.width = x; this.height = y; } myClass.prototype.show = function(){ alert("width = "+ this.width+" height = "+ this.height); } 2) var myNewClass = { init : function(x, y) { this.width = x; this.height = y; }, show : function() { alert("width = "+ this.width+" height = "+ this.height); } }

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• How to make a remove frame script in JavaScript?

  - by Daniel

  I am making websites I refer to from my site load up in a frame (similar to google images). But I also want to give users the ability to break out of that frame. Like with google image's "Remove Frame" link at the bottom right corner of their frame. How can I do this possiblyusing Javascript?

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• What is the purpose of a self executing function in javascript?

  - by Ej

  In javascript, when would you want to use this: (function(){ //Bunch of code... })(); over this: //Bunch of code...

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• Given a javascript array and one of its members, how to retrieve the member index?

  - by tobefound

  Given a javascript array and one of its members, how to retrieve the member index without having to compare the contents of the member against every other member in the array?

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