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Showing posts from November 20, 2012

CSS Float

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The css float property enables you to determine where to position an element relative to the other elements on the page. When you use the float property, other elements will simply wrap around the element you applied the float to. float:left; float: right;
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Div and span

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Div: Div <div> tag is that it divides the HTML document into sections. Proper usage of the <div> tag is fundamental to good HTML coding, the <div> tag is one of the most powerful tools available to a web developer. Span: Span <span> is  in-line level elements, they only span across small amounts of content, typically words or phrases. For example: a <span> tag might be used to make a word red in color or to give it an underline.
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HTML meta elements:

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Metadata is information about data. The <meta> tag provides metadata about the HTML document. Metadata will not be displayed on the page, but will be machine parable. Meta elements are typically used to specify page description, keywords, author of the document, last modified and other metadata. The <meta> tag always goes inside the head element. The metadata can be used by browser(how to display content or reload page), search engines(keyword) or other web services.
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HTML Tables

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The HTML tables is used to show your datas, information, etc in an appropriate way. A table is divided into rows (with the <tr> tag), and each row is divided into data cells (with the <td> tag). td stands for “table data,” and holds the content of a data cell. A <td> tag can contain text, links, images, lists, forms, other tables, etc. To create table, <table> tag is used. An HTML table consists of one or more <tr>, <th> and <td> elements.
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HTML Lists

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There are 3 different types of lists. They are as follows: Ordered List: A <ol> tag is used an ordered list Unordered List: A <ul> tag is used unordered list Dictionary List: A <dl> tag is used for definition lists
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HTML Tags

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Tags are labels you use to mark up the begining and end of an element. All tags have the same format: they begin with a less-than sign “<” and end with a greater-than sign “>”.Generally speaking, there are two kinds of tags – opening tags: <html> and closing tags: </html>. The only difference between an opening tag and a closing tag is the forward slash “/”. You label content by putting it between an opening tag and a closing tag.
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HTML Elements

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An HTML element is everything from the start tag to the end tag. An element consists of three basic parts: an opening tag, the element’s content, and finally, a closing tag. <p> – opening paragraph tag   Element Content – paragraph words  </p> – closing tag Every (web)page requires four critical elements: the html, head, title, and body elements.
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Building calculator using javascript function

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Code: <script type=”text/javascript”> function add() { var first=parseInt(document.getElementById(‘first’).value); var second=parseInt(document.getElementById(‘second’).value); var third=document.getElementById(‘answer’); answer.value= first + second; } function subtract() { var first=parseInt(document.getElementById(‘first’).value); var second=parseInt(document.getElementById(‘second’).value); var third=document.getElementById(‘answer’); answer.value= first – second; } function multiply() { var first=parseInt(document.getElementById(‘first’).value); var second=parseInt(document.getElementById(‘second’).value); var third=document.getElementById(‘answer’); answer.value= first * second; } function divide() { var first=parseInt(document.getElementById(‘first’).value); var second=parseInt(document.getElementById(‘second’).value); var third=document.getElementById(‘answer’); answer.value= first / second; } </script> <table width=”250″ border=”...
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Javascript Functions

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Function is a block of codes that performs certain task. A function contains code that will be executed by an event or by a call to the function. You may call a function from anywhere within a page (or even from other pages if the function is embedded in an external .js file). A function that does not execute when a page loads should be placed inside the head of your HTML document. Creating a function is really quite easy. All you have to do is tell the browser you’re making a function, give the function a name, and then write the JavaScript like normal. HTML & JavaScript Code: <html> <head> <script type=”text/javascript”> <!– function popup() { alert(“Hello World”) } //–> </script> </head> <body> <input type=”button” onclick=”popup()” value=”popup”> </body> </html> Display:
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JavaScript Operators

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JavaScript Arithmetic Operator Chart Operator English Example + Addition 2 + 4 - Subtraction 6 - 2 * Multiplication 5 * 3 / Division 15 / 3 % Modulus 43 % 10 Modulus % may be a new operation to you, but it's just a special way of saying "finding the remainder". When you perform a division like 15/3 you get 5, exactly. However, if you do 43/10 you get an answer with a decimal, 4.3. 10 goes into 40 four times and then there is a leftover. This leftover is what is returned by the modulus operator. 43 % 10 would equal 3. JavaScript Operator Example with Variables Performing operations on variables that contain values is very common and easy to do. Below is a simple script that performs all the basic arithmetic operations. HTML & JavaScript Code: <body> <script type="text/JavaScript"> <!-- var two = 2 var ten = 10 var linebreak = "<br />" document.write("two plus ten = ") var result = two + te...
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JavaScript Variables and Arrays

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JavaScript Variables Variables are used to hold data in memory. JavaScript variables are declared with the var keyword. var age; Multiple variables can be declared in a single step. var age, height, weight, gender; After a variable is declared, it can be assigned a value. age = 34; Variable declaration and assignment can be done in a single step. var age = 34; A Loosely-typed Language JavaScript is a loosely-typed language. This means that you do not specify the data type of a variable when declaring it. It also means that a single variable can hold different data types at different times and that JavaScript can change the variable type on the fly. For example, the age variable above is an integer. However, the variable strAge below would be a string (text) because of the quotes. var strAge = "34"; If you were to try to do a math function on strAge (e.g, multiply it by 4), JavaScript would dynamically change it to an integer. Although this is very conven...
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JavaScript Basics

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Javascript Syntax     JavaScript statements end with semi-colons.     JavaScript is case sensitive.     JavaScript has two forms of comments:   Single-line comments begin with a double slash (//).  Multi-line comments begin with "/*" and end with "*/". Syntax // This is a single-line comment /* This is a multi-line comment. */ Dot Notation In JavaScript, objects can be referenced using dot notation, starting with the highest-level object (i.e, window). Objects can be referred to by name or id or by their position on the page. For example, if there is a form on the page named "loginform", using dot notation you could refer to the form as follows: Syntax window.document.loginform Assuming that loginform is the first form on the page, you could also refer to this way: Syntax window.document.forms[0] A document can have multiple form elements as children. The number in the square brackets ([]) indicates ...
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Difference between Java and Javascript

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Java Java is an Object Oriented Programming (OOP) language created by James Gosling of Sun Microsystems. Initially, it was designed to make small programs for the web browser called applets. Java uses the concept of classes and objects that makes reuse of the code easier Java exhibits the properties like inheritance, data encapsulation and polymorphism. The main features of Java are as follows: Provides more flexibility to develop software applications because of object oriented approach. • Easy to use as it combines the best properties of other programming languages. • Allows code written in Java to run on different platforms or Java code is independent of platform. • The code from the remote source can be executed securely. • Built-in support for computer networks. Java must be compiled into what is known as a "machine language" before it can be run on the Web. Java also supports automated memory management model that allows developers to get rid of the time ...
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Javascript Introduction

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What is JavaScript? JavaScript was designed to add interactivity to HTML pages JavaScript is a scripting language A scripting language is a lightweight programming language JavaScript is usually embedded directly into HTML pages JavaScript is an interpreted language (means that scripts execute without preliminary compilation)
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PHP Introduction and Installation

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PHP is a powerful tool for making dynamic and interactive Web pages.PHP stands for PHP: Hypertext Preprocessor.PHP is a server-side scripting language, like ASP.PHP scripts are executed on the server.PHP supports many databases (MySQL, Informix, Oracle, Sybase, Solid, PostgreSQL, Generic ODBC, etc.).PHP is an open source software.PHP is free to download and use. PHP files can contain text, HTML tags and scripts.PHP files have a file extension of “.php”, “.php3″, or “.phtml”. PHP file can be written as follows: <?php echo “Namaste! Nepal”; ?> Here, <?php is the starting tag and ?> is an ending tag. These must be included to write a php file. And echo is used to print output.
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An introduction to the HTML

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HTML was invented in 1990 by a scientist called Tim Berners-Lee . The purpose was to make it easier for scientists at different universities to gain access to each other’s research documents. The project became a bigger success than Tim Berners-Lee had ever imagined. By inventing HTML he laid the foundation for the web as we know it today.
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An Introduction to CSS

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The CSS is an abbreviation of Cascading Style Sheet. The style-sheet is used to make web pages.  It is used to make a table-less design. The file extension of the css file is .css. There are three ways of inserting style-sheet. i.            External style-sheet ii.            Internal style-sheet iii.            Inline style-sheet
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