To enable and disable submit button, use the jQuery prop() method. You can try to run the following code to enable and disable submit button using jQuery −ExampleLive Demo               $(document).ready(function() {       $('#register').click(function() {       ... Read More

Yes, you can submit form with multiple submit buttons. Attack a custom click handler to all the buttons and the check which button is clicked.ExampleLive Demo               $(document).ready(function(){       $("#myform button").click(function (ev) {       ev.preventDefault()   ... Read More

To create a div dynamically, use the html() method. You can try to run the following code to learn how to create a div dynamically on button click −ExampleLive Demo               $(document).ready(function(){       $("button").click(function(){         ... Read More

Database Management System is quite useful compared to the file based management system. However, it does have some disadvantages. Some of those are as follows −More CostlyCreating and managing a database is quite costly. High cost software and hardware is required for the database. Also highly trained staff is required ... Read More

The systems that are used to organize and maintain data files are known as file based data systems. These file systems are used to handle a single or multiple files and are not very efficient. FunctionalitiesThe functionalities of a File-based Data Management System are as follows −A file based system helps ... Read More

A database is a collection of data, usually stored in electronic form. A database is typically designed so that it is easy to store and access information.A good database is crucial to any company or organisation. This is because the database stores all the pertinent details about  the company such ... Read More

Object oriented data model is based upon real world situations. These situations are represented as objects, with different attributes. All these object have multiple relationships between them.Elements of Object oriented data modelObjectsThe real world entities and situations are represented as objects in the Object oriented database model.Attributes and MethodEvery object ... Read More

To check if event exists on element in jQuery, check for the existing events on the element. Here, I have set the div −   This is demo text. Click here! When you click div, then the alert generates which I have set using the div id:$("#demo").click(function() {   alert("Does event ... Read More

An Object relational model is a combination of a Object oriented database model and a Relational database model. So, it supports objects, classes, inheritance etc. just like Object Oriented models and has support for data types, tabular structures etc. like Relational data model.One of the major goals of Object relational ... Read More

In Ternary relationship three different Entities takes part in a Relationship.Relationship Degree = 3For Example: Consider a Mobile manufacture company.Three different entities involved:Mobile - Manufactured by company. Part - Mobile Part which company get from Supplier. Supplier - Supplier supplies Mobile parts to Company.Mobile, Part and Supplier will participate simultaneously in a ... Read More