JavaScript Archive
19 Jan 2014
document.getElementById
getElementById is a function in JavaScript to access the HTML elements. It’s a function of document object and can only access by using document.getElementById. Example : <html> <script> function sum() { var num1 = document.getElementById(‘num1’); var num2 = document.getElementById(‘num2’); var res = document.getElementById(‘result’); res.value = parseInt(num1.value) + parseInt(num2.value); } </script> <body> Enter First Number :
25 Dec 2013
Array in JavaScript
Array is use to store multiple values in a one variable. Example 1: <script> var a = new Array(); a[0] = 2; alert(a[0]); </script> Example 2: <script> var b = new Array(78,4,5,3,5,7); for(i=0; i < b.length; i++) { alert(b[i]); } </script> Example 3: <script type=”text/javascript”> var ar = new Array(“Ram”,”Deep”,”Ravi”,”Mohit”); for (i=0; i
08 Dec 2013
Popups in javascript
There are three kinds of popup boxes in JavaScript Who to define array in php? Alert box Alert box display message with ok button Example: <html> <script> alert(“Hello Viewers”); </script> </html> Confirm box Confirm box display message with ok and cancel button, it is use to take user confirmation. If we click ok, it returns
07 Dec 2013
Ways of Adding JavaScript code
Following are the ways to add JavaScript in html page. Inline : JavaScript code that we writes inside html tags are called inline JavaScript, useful to write short code in JavaScript. Example: <html> <body> <input type=”button” onclick=”alert(‘hello’)” value=”Hello”/> <input type=”button” value=”Delete” onclick=”return confirm(‘Sure To Delete’)”/> </body> </html> Internal : JavaScript written in same html page
07 Dec 2013
Advantages of javaScript
Easy to learn : JavaScript has simple, easy to learn syntax that we can use with html. Runs on Client Side : JavaScript runs on client side, means it use our own system memory(RAM,etc.) to run, so it’s faster than the server side scripting language, that use server’s memory. Features of programming languages : JavaScript