Mostly, JavaScript runs in your web browser alongside HTML and CSS, and can be added to any web page using a script tag. The script element can either contain JavaScript directly (internal) or link to an external resource via a srcattribute (external).
A browser then runs JavaScript line-by-line, starting at the top of the file or script element and finishing at the bottom (unless you tell it to go elsewhere).
Internal
You can just put the JavaScript inside a script element:
An external JavaScript resource is a text file with a .js extension, just like an external CSS resource with a .cssextension.
To add a JavaScript file to your page, you just need to use a script tag with a src attribute pointing to the file. So, if your file was called script.js and sat in the same directory as your HTML file, your script element would look like this:
<script src="script.js"></script>
Console
The last way is great for getting instant feedback, and it’s recommend if you just want to try a line out quickly.
In a modern browser you’ll find some developer tools - often you can right click on a page, then click “inspect element” to bring them up. Find the console and you’ll be able to type JavaScript, hit enter and have it run immediately.
Search the net if you can’t find your dev tools or console - they’re changing in browsers all the time. Let’s go!
To get started, the best way is the internal method. You can modify the contents of the script element and refresh the page just like you’re used to - quick and easy.
Now it’s time to learn some JavaScript. Good luck!
profile can be used to specify the location of information about the document. The value can be a URI or a number of URI's separated by spaces Exampl <html>
Images showing a smooth dissolve from one color to another are plastered all over the web.
However, CSS 3 allows you to place them in your designs without having to create an actual image file.
There is no special property for this; you simply use the background or background-image property and define your gradient in its value. You can create both linear and radial gradients this way.
Linear gradients
For an even spread of two colors, fading from one at the top to another at the bottom, a declaration can simply be something like:
background: linear-gradient(orange, red);
To manipulate the angle of the fading, you slot in “to” and the destination you want the transition to head to. You can head to one side:
Radial gradients, with one color starting from a central point and fading to another color, use a similar syntax:
background: radial-gradient(yellow, green);
You can also specify the shape of the fade. By default it is an ellipse, spreading to fill the background box, but you can force it to be circular, regardless of the shape of the box:
Using “closest-side”, “closest-corner”, “farthest-side” and “farthest-corner” you can also specify if the gradient is contained by the sides or corners of the box nearest to or furthest away from the origin:
And if you wanted to place the origin of the gradient somewhere specific, you can also use “at”:
background: radial-gradient(at top left, yellow, green);
Color stops
If you don’t want a uniform blend across your gradient, you can specify exactly where in the gradient each color kicks in, straight after each color, starting at “0” and ending at “100%” (although lengths can also be used).
So, just to make it clear before tinkering:
linear-gradient(black 0, white 100%) is the equivalent of linear-gradient(black, white)
radial-gradient(#06c 0, #fc0 50%, #039 100%) is the same as radial-gradient(#06c, #fc0, #039)
linear-gradient(red 0%, green 33.3%, blue 66.7%, black 100%) will have the same result as linear-gradient(red, green, blue, black)
That’s because, when the positions are stated in these examples, they evenly space out the colors, which is the default when no color stops are explicitly defined.
So, to get on with that tinkering, you can pull and stretch away with those stops:
background: linear-gradient(135deg, hsl(36,100%,50%) 10%, hsl(72,100%,50%) 60%, white 90%);
Repeating gradients
A single gradient will fill a box with the previous methods but you can use “repeating-linear-gradient” and “repeating-linear-gradient” to build on the color stops and, well, repeat the gradient.
For basic bars of black-and-white bars, for example:
background: repeating-linear-gradient(white, black 10px, white 20px);
MySQL (/maɪ ˌɛskjuːˈɛl/ "My S-Q-L", officially, but also called /maɪ ˈsiːkwəl/ "My Sequel") is (as of
March 2014) the world's second most widely used open-source relational database management system(RDBMS).It is named after co-founder Michael Widenius's daughter, My. The SQL phrase stands for Structured Query Language.
The MySQL development project has made its source code available under the terms of the GNU General Public License, as well as under a variety of proprietary agreements. MySQL was owned and sponsored by a single for-profit firm, the Swedish company MySQL AB, now owned by Oracle Corporation.
MySQL is a popular choice of database for use in web applications, and is a central component of the widely used LAMP open source web application software stack (and other 'AMP' stacks). LAMP is an acronym for "Linux, Apache, MySQL, Perl/PHP/Python." Free-software-open source projects that require a full-featured database management system often use MySQL.
For proprietary use, several paid editions are available, and offer additional functionality. Applications which use MySQL databases include: TYPO3, MODx, Joomla, WordPress, phpBB, MyBB, Drupal and other software. MySQL is also used in many high-profile, large-scale websites, including Google (though not for searches), Facebook, Twitter, Flickr, and YouTube.
JScript is Microsoft's dialect of the ECMAScript standard that is used in Microsoft's Internet
Explorer.
JScript is implemented as an Active Scripting engine. This means that it can be "plugged in" to OLE Automation applications that support Active Scripting, such as Internet Explorer, Active Server Pages, andWindows Script Host. It also means such applications can use multiple Active Scripting languages (e.g., JScript, VBScript, PerlScript, etc.).
JScript was first supported in the Internet Explorer 3.0 browser released in August 1996. Its most recent version is JScript 9.0, included in Internet Explorer 9.
JScript 10.0 is a separate dialect, also known as JScript .NET, which adds several new features from the abandoned fourth edition of the ECMAScript standard. It must be compiled for .NET Framework version 2 or version 4, but static type annotations are optional.
PHP is a server-side scripting language designed for web development but also used as a general-
purpose programming language. As of January 2013, PHP was installed on more than 240 million websites (39% of those sampled) and 2.1 million web servers. Originally created by Rasmus Lerdorf in 1994, the reference implementation of PHP (powered by the Zend Engine) is now produced by The PHP Group. While PHP originally stood for Personal Home Page, it now stands for PHP: Hypertext Preprocessor, which is a recursive backronym.
PHP code can be simply mixed with HTML code, or it can be used in combination with various templating engines and web frameworks. PHP code is usually processed by a PHP interpreter, which is usually implemented as a web server's native module or a Common Gateway Interface (CGI) executable. After the PHP code is interpreted and executed, the web server sends resulting output to its client, usually in form of a part of the generated web page – for example, PHP code can generate a web page's HTML code, an image, or some other data. PHP has also evolved to include a command-line interface (CLI) capability and can be used instandalone graphical applications.
The canonical PHP interpreter, powered by the Zend Engine, is free software released under the PHP License. PHP has been widely ported and can be deployed on most web servers on almost every operating system and platform, free of charge.
Despite its popularity, no written specification or standard exists for the PHP language; instead, the canonical PHP interpreter serves as a de facto standard. However, work on creating a formal specification has started in 2014.
