Javascript in the address bar
Did you know you can execute Javascript right in your address bar?
- Load any page and go to the address bar.
- Erase the address bar contents and type javascript:alert("Javascript in the address bar!"); Press Enter. You should get the text "Javascript in the address bar!" to appear in an alert box.
Any Javascript code you place after javascript: in the address bar will be executed.
This technique has many uses:
- Find out the number of elements in a form
Type javascript:alert(document.formName.length); where formName is the name of the form you want to find out the number of elements that it has - Calculate simple math
Type javascript:alert(15 * 20); and you will get the answer in an alert box. You can use any numbers and any simple operations (+ - / *) - Change background color of the page
Type javascript:document.body.style.backgroundColor="green";void(0); where "green" is the color you want to change the background color too. The purpose of the "void(0);" at the end is so that the page remains on screen. - Make all the images fly around the screen
Type 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); and you will see how the images on the page fly around the screen. How awesome!