JavaScript Array Object

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Array is an group of element which is stored in a single object variable. If you have list of values of same type, then all the values can be stored in a array object with the index pointing to each value. All the elements in the array would be in the same type. The values […]

JavaScript Boolean Object

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The boolean object is used to represent the boolean value that is true or false. If the value is 0, -0, null, false, “”, undefined, NaN then it is considered as false value. Syntax for Boolean Object Following is the syntax to define Boolean variables using Javascript. Boolean Properties Properties Description constructor It is used to […]

JavaScript – Difference Between Two Dates

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Let us see an example on how calculate difference between dates using Javascript. First write a HTML code with Javascript as below: The above program is used to calculate the days of difference between two dates . we have set two dates to two variables in the program var d1 = new Date(“12/12/2011″); and var […]

JavaScript Random Number

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The random object is used to generate a random numbers in JavaScript. It generates the number from 0 to 1 by using Math.random( ) object in the program which is a method of JavaScript Math object. The Math object provides built-in-functions that perform mathematical operations. Math.random Syntax var x= Math.random( ); Math.random Example In the above example we […]

JavaScript InnerHTML

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The innerHTML property is used to set or retrieve the inner HTML of the element between the start and end tags of the object. Each HTML element has innerHTML property which defines both code and text between start and end tag. In most of the cases, we use this property inside a “div” tag to […]

JavaScript Prototype

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The prototype object is used to add property and methods to the objects. The prototype object can be used on any custom objects. Before creating a new object, prototype object has to be attached before the object name. Prototype is a global property which is present in almost all objects. The Object.prototype is used to […]

Number Rounding in JavaScript

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The Number rounding is used in the math object. It is used to round up the given value to its nearest value. For example, consider a decimal number 4.6 then this number can be rounded up as 5, if the value after the decimal point is less than 5 then it would be round up as […]

JavaScript Debugging

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Debugging is process of identifying and reducing the number of bugs or defects in the programs. There several ways to debug the JavaScript : Using JavaScript Validator JavaScript can be used to validate data in the HTML documents before sending the content to the server. Validation occur at server side when client had entered data successfully […]

JavaScript String Object

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The string object is used to represent a sequence of character. The string value should be written in quote then only it will consider as string otherwise it will be consider as integer. This tutorial highlights the benefits of using the JavaScript string object. Syntax of String Object String Properties Name Description constructor It is […]

How To Print Page using JavaScript

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Some times we would like to print some important content on the web page via printer. The JavaScript provide print () method to print contents of the current window. It implements print() function of the window object. The print() method opens print dialog box which allows to select printing options. Syntax for Window.print The print() […]