JavaScript Miscellaneous FAQ

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FAQ 17 Where are the official online JavaScript documents?
FAQ 20 Can I have a counter without the need for CGI or counter providers?
FAQ 21 Can I detect the language set in user's browser?
FAQ 22 How do you debug JavaScript?
FAQ 43 How do I detect the browser the user is using?
FAQ 62 How do I code if-else-if?
FAQ 92 How is the "return" reserved word used?
FAQ 93 How can I redirect a visitor to separate pages, keeping the domain name they came in with based on the referrer?
FAQ 97 How can I do a multiple choice quiz?
FAQ 105 I see on you web page that you can download you site for viewing later. Could you tell me how I would set up similar for part of my web site?
FAQ 106 Looking for a good simple JavaScript counter?
FAQ 115 Do you know how I can detect the users choice in the "preferred language", in Netscape Communicators preferences?
FAQ 125 How do I pre-load a page?
FAQ 140 Is there a way of telling which language the users browser is using?
FAQ 155 What does "return false" do? When is it necessary? When is it not?
FAQ 160 Can you access global variables (such as MyName) from a different page than where it is held?
FAQ 178 How can I use the void method without causing problems in browsers that do not support it?
FAQ 181 How can I make a new variable with a name based on the value of another variable?
FAQ 210 I keep receiving function undefined in the following script, why?
FAQ 233 Is it possible to trap control key presses?
FAQ 234 How can I trap errors?
FAQ 239 How can I check if the browser is Opera and which version?
FAQ 257 How can I detect when a visitor is leaving my site?
FAQ 259 Is is possible to trap Shift and/or Ctrl key sequences?
FAQ 277 How do I capture what the user entered when using prompt()?
FAQ 283 Can I access the browsers find and copy controls?
FAQ 321 Can I retrieve information in a META tag?
FAQ 329 When trying to access information from a page from another server I get "access disallowed", how can I get around this?
FAQ 351 How can I detect a Mac computer and use a larger font?
FAQ 395 Is there any way to clear the users cache before they begin to load my page?
FAQ 402 Is there a way to invoke a function when a certain button (specifically the left or right arrow key) is pressed?
FAQ 482 Is there any way to detect plugins?
FAQ 507 How can I capture and handle all "click" events in a document?
FAQ 530 My variable 'dir' doesn't work in Internet Explorer 4, aren't browser vendors supposed to follow some sort of standard?
FAQ 536 How does a function know which object called it?
FAQ 544 Can I embed my own font in a page?
FAQ 580 How can I detect when a page hasn't loaded within, say, 30 seconds?
FAQ 604 Is there a way to save/retain the values of global variables when the user resizes their web browser?
FAQ 639 Can I create an 'on error resume next'?
FAQ 643 How can I display a variable in my HTML page, is the answer &{script-statements};?
FAQ 644 Is it possible to just have the title in Netscape Navigator without 'Netscape:' in front, like in Microsoft Internet Explorer?
FAQ 675 How do you get out of a loop once a certain condition is met?
FAQ 704 What is the difference between plug-ins on Netscape Navigator and Active-X components on Microsoft Internet Explorer?
FAQ 705 Where have all the JavaScript error messages gone in Netscape Navigator 4.5?
FAQ 742 How can I change the title or caption of an alert or confirm box?
FAQ 772 When coding if-else-if conditions, do I have to include the braces?
FAQ 778 How can I test to see if a variable has been assigned a value/declared?
FAQ 833 Can you create a line break in a confirm dialogue box so that box width is less?
FAQ 835 How do I detect browsers and load different pages according to the browser (Netscape v Explorer)?
FAQ 860 How do I capture the results from a CGI script?
FAQ 873 Where can I find out about the methods isPlainHostName(), dnsDomainIs(), localHostOrDomainIs(), isResolvable(), isInNet(), dnsResolve(), myIpAddress(), dnsDomainLevels(), shExpMatch() that the proxy Auto-config file in Netscape uses?
FAQ 896 Can I make the browser go to the users homepage?
FAQ 899 How can I find out the Operating System of the client?
FAQ 950 Is it possible to change the value of preferences in Netscape Communicator?
FAQ 958 How can I export and import functions, objects and properties?
FAQ 1010 Can I find out how large a users cache is?
FAQ 1030 How can I use a different Cascading Style Sheet for the Mac and Windows?
FAQ 1036 How can I calculate the processor speed of the users browser?
FAQ 1042 How can I distinguish between MAC and WinNT?
FAQ 1044 How do I direct the browser to an anchor on a dynamically generated page from within that dynamically generated page?
FAQ 1112 How do I type in a product code (i.e jaw1024) and return the price for that product in another text box, then enter a quantity in a text box and return a total price based on quantity?
FAQ 1125 Is it possible for Javascript to do DNS lookups?
FAQ 1126 How can you find out if a browser has support for 128-bit encryption?
FAQ 1150 How can I find out how fast someones computer is?
FAQ 1162 How can I avoid the "Data Missing, please hit reload" screen in Netscape when resizing a page that is produced from POSTed form?
FAQ 1164 Since CD-ROM drives may be on different drives on different computers, can I use Javascript to find the CD-ROM drive?
FAQ 1168 How can I set the cache expiration date on an HTML file to, say, midnight of the day the page is first served?
FAQ 1198 How can I check with the user that they really do want to leave my page?
FAQ 1206 How can I accesss the CGI variable REMOTE_USER from JavaScript?
FAQ 1221 How can I validate a post code/zip code with an itermidiate page that states whether it is valid or not?
FAQ 1238 Using JavaScript how can I force the browser to reload the current page every second from the server?
FAQ 1273 How do you managed to create an icon in the Microsoft Internet Explorer favourites directory?
FAQ 1278 How can I add an image to a favourite when someone bookmarks my site?
FAQ 1331 What does "indexOf" do?
FAQ 1350 Is there a way to change the default page of the browser through JavaScript?
FAQ 1355 How can I write debug messages to the Java Console?
FAQ 1359 How can redirect depending on whether the browser has a QuickTime plug-in?
FAQ 1361 On some sites I ocassionally get a window that says "JavaScript Error" with a code number. Is this a problem with the WebSite or my computer?
FAQ 1364 How can I calulate how long it takes to render a page?
FAQ 1392 Can I access data from one page from one domain from another page from another domain?
FAQ 1411 How can I filter a client side JavaScript array using regular expressions?
FAQ 1419 How do I stop pages from being cached in Internet Explorer ?
FAQ 1516 Is there any way to search a site using Javascript?
FAQ 1522 How can I disable the back button and prevent other users/hackers from viewing the private pages of the (site/contents) of a user who has logged out?
FAQ 1531 Is it possible to expire a page using JavaScript with out using tags in the header?
FAQ 1535 Is it necessary to hide JavaScript code contained in .js source files using the  characters around all the script found in an external file?
FAQ 1544 How can I provide a translate button to invoke AltaVista's Babel Fish to translate a page from English to French?
FAQ 1556 How can I ask the user their name and then display it on the page?
FAQ 1566 When displaying an alert, how can I close the alert box and send the user to a certain page when they click OK?
FAQ 1567 How can I download a page in the background of another, or preload the images and sound of a page behind another more simple page, then after a pre determined length of time go to the ready assembled page?
FAQ 1577 How do I detect the browser's color depth and change the background graphic/color accordingly?
FAQ 1603 How can I use Javascript to stop loading the current page by pressing a button?
FAQ 1605 How can I supply different values to the location object's replace() method, perhaps based on the current date, by invoking a function?
FAQ 1607 Can JavaScript reference the meta tag name and values in an HTML document, i.e. author, description, keywords?
FAQ 1615 Is it possible to detect the browser and use one of two external style sheets?
FAQ 1616 How do you generate JavaScript from inside JavaScript?
FAQ 1633 Is it possible to start Internet Explorer with an index.html page loaded fullscreen without toolbars?
FAQ 1651 Is there any way to detect whether Internet Explorer users have a Flash Plugin?
FAQ 1768 How can I accesss the CGI variable REMOTE_USER from JavaScript?
FAQ 1783 Are Pop-Up Windows Legally and Morally Proper?
FAQ 1794 How to detect the type of connection (modem/cable/router) of a web browser?
FAQ 1799 do you have any neat tricks to capture the current page's source?
FAQ 1808 Can I use a scrollbar to change a variable?