How to Use Javascript Injections

Javascript injections are tricks that can be used to change a website in a browser as well as check to see if there are any cookies on the website. The cool part about injections is that they are harmless to the website and really only affect what you see in your browser. They can also be used to spoof a website.

Difficulty: Moderately Easy

Instructions

Things You'll Need:

• Computer
• Strong Internet connection

How to Use Javascript Injections

1. 
    

   Open a Web page using your Web browser.

2. Type javascript:alert('How, To'); into your URL address bar.

3. 
    

   Hit "enter" and watch the dialog box pop up. Click "OK".

4. 
    

   Type "javascript:alert(document.cookie)" to see if there are any cookies on the website.

5. 
    

   Check for cookies. Copy down the field.

6. Copy and paste "javascript:void(document.cookie="Field = myValue")" into the address bar. Hit "enter".

7. 
    

   Edit the "javascript:void" command. Change "field" to a field found in the cookie alert. Next, change "myValue". Remember, if you continue to change the fields, you can change what is said in the cookie alert.

Tips & Warnings

• Search the web for other types of javascript injections
• Javascript injections only work for spoofing websites, not for hacking into one.
• Do not attempt to illegally deface or "phish" a website using more advanced hacking methods or you will be arrested.