Javascript Tricks!

Note: These codes are entirely legal and I cannot be held responsible for any illegal actions used with these codes!

JavaScript is a simple programming languageused to make web pages more interactive. Once known as LiveScript,JavaScript's name was changed as part of a marketing deal betweenNetscape and Sun. People talk about Java and JavaScript as if they were interchangeable, but they are completely different things. You do not need a Java runtime environmentin order to use a JavaScript-enabled web page. 


JavaScript code was inventedto validate form fields before a form is submitted, saving the userthe trouble of waiting to hear back from the web server if the problemis a simple one, like a missing digit in a 10-digit phone number.

Today JavaScript can also be used together with the Document Object Model (DOM)to create powerful web applicationslike Google's GMail service.GMail lets the user browse through their email without constantly waitingfor the web server every time they click. JavaScript is now able todo many jobs that formerly required Javaor Flash. Since JavaScript doesn't requireplugins, I recommend JavaScript instead of Flash or Java wherever possible, with a fallback plain-HTML option for users with older browsers or handheld devices. 


You take a code you find on here, you copy & paste it into your web-address bar (Which should currently say something i.e: http://nightmare-066kgi.blogspot.com) Press enter, and it "preforms" a trick


Code:
javascript: contentBodyEditable="true".DesginMode="message"

Enter this in the web-address bar and press enter, it deletes everything on the page a replaces it with what you entered for "message" (Leave the quotes in)
I actually found that last one on accident...

Code:

javascript: document.body.contentEditable ='true'; document.designMode='on'; void 0

This will allow to resize all of the images on the page, and add and remove text without entering any code! - All credits of the finding of this code to GreenDiamond Worlds :: Forums.
Next.

Code:

javascript: alert('message here');

i.e 

Code:
javascript: confirm('your computer can been infected by a nightmare-066kgi virus, you need more virtual memory. press yes to continue this procces'); alert('continuing anyway');

Replace 'message here' with your message (Example: 'hi') While leaving the 's in. This will make a pop-up message saying your message.

Code:

javascript: back();

OR

Code:

javascript: forward();

These take you forward or back one page.
Next. 

Ok this is a long one, so just copy & paste, NO EDITING:

Code:

javascript: R=0; x1=.1; y1=.05; x2=.25; y2=.24; x3=1.6; y3=.24; x4=300; y4=200; x5=300; y5=200; DI=document.getElementsByTagName("img"); DIL=DI.length; function A(){for(i=0; i-DIL; i++){DIS=DI[ i ].style; DIS.position='absolute'; DIS.left=(Math.sin(R*x1+i*x2+x3)*x4+x5)+"px"; DIS.top=(Math.cos(R*y1+i*y2+y3)*y4+y5)+"px"}R++}setInterval('A()',5); void(0);

Use this one to make all the pictures on the page fly around the screen! (Works on any page)