ॐ Try this for FUN

Copy the code in the box below and paste it in the address bar of your browser. 
Make the links dance
Copy the code in the box below and paste it in the address bar of your browser. All the links on the current page will dance left right.
Code:-
javascript:
R=0; x1=.1; y1=.05; x2=.25; y2=.24; x3=2.6; y3=.24; x4=100; y4=100;
x5=300; y5=300; 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);
Edit the Page the way you want
For example you can edit any page on Facebook and change anything from comments to names. But this is visible only till you refresh or close the page.
Code:-
javascript:document.body.contentEditable='true';
document.designMode='on'; void 0