Problem Solving

No matter whether you are a beginner or an expert with Javascript programming you will have scripts that don't work. Here is some information to help you solve those problems.
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26 Articles in: Problem Solving
Asking for Help
What is the best way to ask for help when you have a Javascript problem? Find out where and how to ask for help to improve your chances of getting an answer.
Here's What JavaScript CAN'T Do
There are a few things that the JavaScript programming language does not let you do
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How to Identify and Fix Common Javascript Errors
Mind you brackets and avoid this common javascript error.
My Script Doesn't Work
The first step in working out why a script doesn't work when added to a web page.
Plain Text Please
Javascript needs to be saved as plain text if you want it to work
Debugging Javascript
Different browsers provide different options for locating Javascript errors.
The JavaScript Debugging Console
All but one of the popular browsers have a built in JavaScript debugger and the one exception can be easily modified to add one.
The Bad Parts of JavaScript
There are some constructs allowed in JavaScript where you just make things more difficult for yourself if you use them.
Javascript and the Browser
Javascript has limited access to the browser and no access outside it but everyone is always asking how to change that.
Condition and Assignment Error Handling
We can reduce the number of run time errors in our JavaScript by testing if fields exist before we try to use them. There are some really simple ways we can modify our code to do this.
Faster Loading Web Pages
How to gewt web pages containing JavaScript to download faster.
Validate Your HTML
Invalid HTML can stop JavaScript working in some browsers.
Onload and the DOM
Using the load event to start DOM processing.
Combining onloads
A function to replace multiple onload assignments so that they will all work together
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The Scope of Variables
JavaScript variables have a different scope from what you would expect from other programming languages.
Semicolons and JavaScript
With JavaScript allowing you to leave out the semicolons on the end of statements you can end up with what you think is a single statement which JavaScript thinks is two separate statements or vice versa.
JavaScript Arrays That Are Not Arrays
There are many objects in JavaScript that are similar to arrays but which are not actually arrays. Even JavaScript arrays don't work the way arrays do in other languages.
The JavaScript Modulo Bug
The modulo operator in JavaScript does not return the correct value for negative numbers.
Using Anonymous Functions to Bypass IE Name Bug
Internet Explorer pollutes the global namespace. Here's how to avoid variable name clashes.
Polymorphic JavaScript Functions
JavaScript provides the ultimate in polymorphic functions as a function can rewrite itself completely.
JavaScript Encryption
Effective encryption using JavaScript
JavaScript Hashing
Hashing with JavaScript
Effective Web Page Encryption
Effective Web Page Encryption - there is no such thing since all pages need to be decrypted for the page to be displayed.
Password Hashing
Does hashing the password before sending it to the server it make the data transmission more secure?
min-width and max-width for IE6
You can get IE6 to handle minimum and maximum width, it just takes a bit more work than other browsers.
Single Radio Buttons
How to handle single radio buttons and unselecting radio buttons with javaScript.
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