Useful Javascript Codes For Browser

How to use these codes? Copy and paste it the the address bar, press enter and get the effect.

Make your browser move it self -- Click here to see the effect
javascript:function Shw(n) {if (self.moveBy) {for (i = 35; i > 0; i--) {for (j = n; j > 0; j--) {self.moveBy(1,i);self.moveBy(i,0);self.moveBy(0,-i);self.moveBy(-i,0); } } }} Shw(6)

Edit any part in the webpage -- Click here to see the effect
javascript:document.body.contentEditable='true'; document.designMode='off'; void 0