01
不常給樹澆水的理由
02
路的旁邊還是路
03
厚道
04
眼見一定是事實嗎?
05
真善無敵
06
真正的富有
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08
B. 閱讀文章後,登入Gmail,在留言區直接發表心得
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| Prefix | Base 1000 | Base 10 | Base 2 | English word | Adoption | ||
|---|---|---|---|---|---|---|---|
| Name | Symbol | Short scale | Long scale | ||||
| yotta | Y | 10008 | 1024 |
280
| septillion | quadrillion | 1991 |
| zetta | Z | 10007 | 1021 |
270
| sextillion | trilliard | 1991 |
| exa | E | 10006 | 1018 |
260
| quintillion | trillion | 1975 |
| peta | P | 10005 | 1015 | 250 | quadrillion | billiard | 1975 |
| tera | T | 10004 | 1012 | 240 | trillion | billion | 1960 |
| giga | G | 10003 | 109 | 230 | billion | milliard | 1960 |
| mega | M | 10002 | 106 |
220
| million | 1873 | |
| kilo | K | 10001 | 103 |
210
| thousand | 1795 | |
| 10000 | 100 | 1 | one | – | |||
| milli | m | 1000−1 | 10−3 |
2-10
| thousandth | 1795 | |
| micro | µ | 1000−2 | 10−6 |
2-20
| millionth | 1873 | |
| nano | n | 1000−3 | 10−9 |
2-30
| billionth | milliardth | 1960 |
| pico | p | 1000−4 | 10−12 |
2-40
| trillionth | billionth | 1960 |
| femto | f | 1000−5 | 10−15 |
2-50
| quadrillionth | billiardth | 1964 |
| atto | a | 1000−6 | 10−18 |
2-60
| quintillionth | trillionth | 1964 |
| zepto | z | 1000−7 | 10−21 |
2-70
| sextillionth | trilliardth | 1991 |
| yocto | y | 1000−8 | 10−24 | 2-80 | septillionth | quadrillionth | 1991 |
var e = '123';
e = Number(e); // 123
var e = '123.45abc';
var e1 = parseInt(e, 10); // 123
var e2 = parseFloat(e); // 123.45
var f = 'abc123';
var f1 = Number(f); // NaN
var f2 = parseInt(f, 10); // NaN
var f3 = parseFloat(f); // NaN
數值轉字串
var a=10;
a = String(a);
alert(typeof a);
var a=10;
a = a.toString();
alert (typeof a);
$(document).ready(fn)與$(window).load(fn)
| Property | Description |
|---|---|
| hash | Sets or returns the anchor part (#) of a URL |
| host | Sets or returns the hostname and port number of a URL |
| hostname | Sets or returns the hostname of a URL |
| href | Sets or returns the entire URL |
| origin | Returns the protocol, hostname and port number of a URL |
| pathname | Sets or returns the path name of a URL |
| port | Sets or returns the port number of a URL |
| protocol | Sets or returns the protocol of a URL |
| search | Sets or returns the querystring part of a URL |
| Method | Description |
|---|---|
| assign() | Loads a new document |
| reload() | Reloads the current document |
| replace() | Replaces the current document with a new one |
| Property | Description |
|---|---|
| availHeight | Returns the height of the screen (excluding the Windows Taskbar) |
| availWidth | Returns the width of the screen (excluding the Windows Taskbar) |
| colorDepth | Returns the bit depth of the color palette for displaying images |
| height | Returns the total height of the screen |
| pixelDepth | Returns the color resolution (in bits per pixel) of the screen |
| width | Returns the total width of the screen |
| Property | Description |
|---|---|
| appCodeName | Returns the code name of the browser |
| appName | Returns the name of the browser |
| appVersion | Returns the version information of the browser |
| cookieEnabled | Determines whether cookies are enabled in the browser |
| geolocation | Returns a Geolocation object that can be used to locate the user's position |
| language | Returns the language of the browser |
| onLine | Determines whether the browser is online |
| platform | Returns for which platform the browser is compiled |
| product | Returns the engine name of the browser |
| userAgent | Returns the user-agent header sent by the browser to the server |
| Property | Description |
|---|---|
| closed | Returns a Boolean value indicating whether a window has been closed or not |
| defaultStatus | Sets or returns the default text in the statusbar of a window |
| document | Returns the Document object for the window (See Document object) |
| frameElement | Returns the <iframe> element in which the current window is inserted |
| frames | Returns all <iframe> elements in the current window |
| history | Returns the History object for the window (See History object) |
| innerHeight | Returns the inner height of a window's content area |
| innerWidth | Returns the inner width of a window's content area |
| length | Returns the number of <iframe> elements in the current window |
| localStorage | Allows to save key/value pairs in a web browser. Stores the data with no expiration date |
| location | Returns the Location object for the window (See Location object) |
| name | Sets or returns the name of a window |
| navigator | Returns the Navigator object for the window (See Navigator object) |
| opener | Returns a reference to the window that created the window |
| outerHeight | Returns the outer height of a window, including toolbars/scrollbars |
| outerWidth | Returns the outer width of a window, including toolbars/scrollbars |
| pageXOffset | Returns the pixels the current document has been scrolled (horizontally) from the upper left corner of the window |
| pageYOffset | Returns the pixels the current document has been scrolled (vertically) from the upper left corner of the window |
| parent | Returns the parent window of the current window |
| screen | Returns the Screen object for the window (See Screen object) |
| screenLeft | Returns the horizontal coordinate of the window relative to the screen |
| screenTop | Returns the vertical coordinate of the window relative to the screen |
| screenX | Returns the horizontal coordinate of the window relative to the screen |
| screenY | Returns the vertical coordinate of the window relative to the screen |
| sessionStorage | Allows to save key/value pairs in a web browser. Stores the data for one session |
| scrollX | An alias of pageXOffset |
| scrollY | An alias of pageYOffset |
| self | Returns the current window |
| status | Sets or returns the text in the statusbar of a window |
| top | Returns the topmost browser window |
| Method | Description |
|---|---|
| alert() | Displays an alert box with a message and an OK button |
| atob() | Decodes a base-64 encoded string |
| blur() | Removes focus from the current window |
| btoa() | Encodes a string in base-64 |
| clearInterval() | Clears a timer set with setInterval() |
| clearTimeout() | Clears a timer set with setTimeout() |
| close() | Closes the current window |
| confirm() | Displays a dialog box with a message and an OK and a Cancel button |
| focus() | Sets focus to the current window |
| getComputedStyle() | Gets the current computed CSS styles applied to an element |
| getSelection() | Returns a Selection object representing the range of text selected by the user |
| matchMedia() | Returns a MediaQueryList object representing the specified CSS media query string |
| moveBy() | Moves a window relative to its current position |
| moveTo() | Moves a window to the specified position |
| open() | Opens a new browser window |
| print() | Prints the content of the current window |
| prompt() | Displays a dialog box that prompts the visitor for input |
| resizeBy() | Resizes the window by the specified pixels |
| resizeTo() | Resizes the window to the specified width and height |
| scroll() | Deprecated. This method has been replaced by the scrollTo() method. |
| scrollBy() | Scrolls the document by the specified number of pixels |
| scrollTo() | Scrolls the document to the specified coordinates |
| setInterval() | Calls a function or evaluates an expression at specified intervals (in milliseconds) |
| setTimeout() | Calls a function or evaluates an expression after a specified number of milliseconds |
| stop() | Stops the window from loading |