After attending an HTML class, your first excise to submit an html form must be using a <input type=”submit”> button. Clicking the button will submit the values in the form […]

How to change image on hover using CSS? Here we give you two methods: using two images <html> <head> <title>test</title> <style> .altericon1{width:130px; display:block; height:33px; line-height:33px; overflow:hidden; background-image:url(icon1.jpg); background-repeat:no-repeat; } .altericon2{width:130px; […]

When you visit a url (such as Firefox, and the url is redirected to another url such as, Firefox will remember the redirecting url. Thus, if you type […]

CORS – Cross Origin Resource Sharing, is mainly a stuff on client side(more accurately, a browser) . It is a policy exerted by modern browsers to block accessing resources¬† on […]

The most often occurred use case is: user opens a webpage; the webpage reads data from database and displays it to the user; the user modifies some of the data […]

Some web pages need authentication to access. Only authorized users are allowed to read those pages. For example, wordpress back-end pages are prohibited from accessing by unauthorized visitors(you can refer […]