The screen object specifies information about dimensions of the user’s screen and display settings. It is special object for inspecting properties of the screen on which the current window is being rendered. There is no public standard that applies to the screen object, but all major browsers support it. Javascript Screen Object Properties The following are the …
JavaScript
How To Get Operating System using JavaScript
To determine operating system on the client machine, we can make use of navigator.appVersion or navigator.userAgent. Example To Get Operating System using JavaScript The following example demonstrates detection of operating system on the client machine. <script type=”text/javascript”> tag is used to define client side script which uses attribute type for specifying MIME type. Navigator object …
Javascript Math Object
The Math object provides a collection of properties of Number objects and methods. It is built in object which has properties and methods for mathematical constants and functions. It allows performing mathematical tasks. It has methods for trigonometric functions, such as sin( ), cos( ) and also used for mathematical operation. Math is not constructor. …
JavaScript Date Object
JS Date Object is used to set the date, time, hour, minute and seconds. It is used to store the current date and time in the program. The date properties of date object are in two forms, local and Greenwich mean time(GMT). Syntax for Date Object Date Property Name Description constructor It is used to …
JavaScript Document Object
A document object represents the HTML document that is displayed in the window. Document is parent object of objects such as images, forms etc. The client window size is associated with the webpage which we access using document object in the JavaScript. This object is same as getElementById() method which we use to access the …
Enabling / Disabling Form Elements using JavaScript
The Enabling/Disabling element takes two values that is true or false, if we set to true then we can enable the element that means the user can edit the elements which user wants to do in the form or text box or else if it is set to be false then the element is disable …
Javascript RegExp Object
The RegExp object is known as regular expression, it is used to specify the pattern of characters. Regular expressions are patterns used to match character combinations in strings. This is used for the pattern matching and also very useful for search and replace the text. In JavaScript, these are objects. This tutorial describes how to use …
Javascript – Handling Runtime Errors using try/catch/finally
Error handling means detection of errors in the programming. When we are executing javascript code, we may get different types of errors. It can be syntax errors or run time errors. Syntax errors occur when misspelling of identifiers and keywords, missing double quotes in strings, use of undeclared variables, bad references to objects, improper use …