Tutorial Get All Possible DOM Events

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You can get an array of all the events that start with "on" (e.g. onclick) by running this in the Console of Firefox.

[i for(i in document)].filter(function(i){return i.substring(0,2)=='on'&&(document[i]==null||typeof document[i]=='function');})

You'll get an array like this (Firefox 23):

["onreadystatechange", "onmouseenter", "onmouseleave", "onwheel", "oncopy", "oncut", "onpaste", "onbeforescriptexecute", "onafterscriptexecute", "onabort", "oncanplay", "oncanplaythrough", "onchange", "onclick", "oncontextmenu", "ondblclick", "ondrag", "ondragend", "ondragenter", "ondragleave", "ondragover", "ondragstart", "ondrop", "ondurationchange", "onemptied", "onended", "oninput", "oninvalid", "onkeydown", "onkeypress", "onkeyup", "onloadeddata", "onloadedmetadata", "onloadstart", "onmousedown", "onmousemove", "onmouseout", "onmouseover", "onmouseup", "onpause", "onplay", "onplaying", "onprogress", "onratechange", "onreset", "onseeked", "onseeking", "onselect", "onshow", "onstalled", "onsubmit", "onsuspend", "ontimeupdate", "onvolumechange", "onwaiting", "onmozfullscreenchange", "onmozfullscreenerror", "onmozpointerlockchange", "onmozpointerlockerror", "onblur", "onerror", "onfocus", "onload", "onscroll"]

Firefox, because it supports array comprehension which that little snippet uses.

Reference URL

Tutorial Format Currency

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This function will round numbers to two decimal places, and ensure that the returned value has two decimal places. For example 12.006 will return 12.01, .3 will return 0.30, and 5 will return 5.00

function CurrencyFormatted(amount) {
	var i = parseFloat(amount);
	if(isNaN(i)) { i = 0.00; }
	var minus = '';
	if(i < 0) { minus = '-'; }
	i = Math.abs(i);
	i = parseInt((i + .005) * 100);
	i = i / 100;
	s = new String(i);
	if(s.indexOf('.') < 0) { s += '.00'; }
	if(s.indexOf('.') == (s.length - 2)) { s += '0'; }
	s = minus + s;
	return s;
}

Tutorial Fix IE 10 on Windows Phone 8 Viewport

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(function() {
  if (navigator.userAgent.match(/IEMobile\/10\.0/)) {
    var msViewportStyle = document.createElement("style");
    msViewportStyle.appendChild(
      document.createTextNode("@-ms-viewport{width:auto!important}")
    );
    document.getElementsByTagName("head")[0].appendChild(msViewportStyle);
  }
})();

Quick backstory

For IE 10 (desktop) to work in it's new "snap mode" you need to use this:

@-ms-viewport {
  width: device-width;
}

But that screws up some Windows Phone 8 phones, overriding the meta viewport tag and rendering as far too large on small screens. So the answer, for now, is this gnarly device detection/injection script.

Longer backstory

Matt Stow: Responsive Design in IE10 on Windows Phone 8 Tim Kadlec: Windows Phone 8 and Device-Width

Tutorial Error-Free Console Logging

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var Fb = {}; //An empty object literal for holding the function
Fb.log = function(obj, consoleMethod) {
       if (window.console && window.console.firebug && window.console.firebug.replace(/^\s\s*/, '').replace(/\s\s*$/, '') !== '') {
               if (typeof consoleMethod === "string" && typeof console[consoleMethod] === "function") {
                       console[consoleMethod](obj);
               } else {
                       console.log(obj);
               }
       }
}

If you leave console.log, console.info, etc messages in your JavaScript code and open the page in browser like IE then it may halt the page loading completely saying that 'console not defined' especially if your user uses a non IE8 browser.

This code snippet will allow you to leave the logging message as such in your code if you wish and your page will render properly in IE or any other browser that does not support the console messages.

Usage

Fb.log("This will be logged");

Fb.log("This will be displayed in console as info", "info");

The FB.log function accepts two parameters the first one is the "item" that you want to display in the firebug console and the second one is the firebug method that you want to use for the logging, like info, error, etc. If you omit the second parameter the result will be equivalent to console.log()

Simple log-only way

function ltc(what) {
       try {
               console.log(what);
       }
       catch (e) {}
       finally {
               return;
       }
}
ltc("message");

Tutorial Empty an Array

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This is one of the fastest and easiest ways of emptying an array. Of course there are may other ways, but those usually include creation of a new array. This way you reuse the same array.

var myArray = ["one", "two", "three"];

// console.log( myArray ) => ["one", "two", "three"]

myArray.length = 0;

// console.log( myArray ) => []

Tutorial Different Stylesheets for Different Days of the Week

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<script type="text/javascript">
<!--
dayNames = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
dayNumber = new Date().getDay();
document.writeln('<link rel="stylesheet" type="text/css" href="' + dayNames[dayNumber] + '.css">');
//-->
</script>

<noscript>
<link rel="stylesheet" type="text/css" href="default.css">
</noscript>

Name your css files accordingly: Saturday.css, Friday.css, Sunday.css, etc...

If JavaScript is disabled in the browser, it will revert back to the default.css file.

Tutorial Different Stylesheet Pending the Time of Day

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<script>
<!--
function getStylesheet() {
      var currentTime = new Date().getHours();
      if (0 <= currentTime&&currentTime < 5) {
       document.write("<link rel='stylesheet' href='night.css' type='text/css'>");
      }
      if (5 <= currentTime&&currentTime < 11) {
       document.write("<link rel='stylesheet' href='morning.css' type='text/css'>");
      }
      if (11 <= currentTime&&currentTime < 16) {
       document.write("<link rel='stylesheet' href='day.css' type='text/css'>");
      }
      if (16 <= currentTime&&currentTime < 22) {
       document.write("<link rel='stylesheet' href='evening.css' type='text/css'>");
      }
      if (22 <= currentTime&&currentTime <= 24) {
       document.write("<link rel='stylesheet' href='night.css' type='text/css'>");
      }
}

getStylesheet();
-->
</script>

<noscript><link href="main.css" rel="stylesheet"></noscript>

Name your css files accordingly: night.css, day.css, etc... One cool bonus is that since JavaScript gets the time from the local machine instead of from the server, users will be served the time-based stylesheet based on their time, not the server's, which may be in a completely different timezone.

If JavaScript is disabled in the browser, it will default to the main.css stylesheet.