Well, recently I was at Lightstar's site and noticed a section I hadn't seen there before. I became curious as to when it was added.

Then I remembered, javascript can do this for you. So naturally, I searched google and found out how. In addition to this little trick, I've included some other nifty things javascript can do for you as well in this tutorial.

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To find the last modified date of a webpage:
Type into the address bar:
java script:alert(document.lastModified)

Note: Keep in mind sites such as this one that generate pages dynamically will show a last modified time of the time you loaded the page. Also, different time zones and server times will affect the date displayed. Don't take this at face value, but rather just as a way to get an idea of how new the page is.

To make a popup say whatever you want:
Type into the address bar: java script:alert("Eat my shorts")

Note: Notice the quotes. These are important within the parenthesis of this function. Also, be aware you can type whatever you like in between these quotes.

To do arithmetic:
Type into the address bar: java script:alert(1+5)

Note: You can perform more than just addition through this method. Calculator is much quicker however.

To find the background color of a webpage:
Type into the address bar: java script:alert(document.bgColor)

Note: Will be returned as the hex number of the color specified in the source code as the background color.

To find out what cookies the page has stuck on your computer:
Type into the address bar: java script:alert(document.cookie)

Note: This will give you a popup listing your cookies. This popup may be impossible to read, may provide info such as your username and/or password, or may be blank. Don't put much faith into this, as the results won't be very useful.

To find out where a webpage is submitting it's forms:
Type into the address bar: java script:alert(document.forms[0].action)

Note: This will return the action url for the first form in a document. To find the same info for a second form, use java script:alert(document.forms[1].action) and so on. Just start with 0 as the first form and increment accordingly.

To find specific details:
For browser type: java script:alert(navigator.appName)
For version/OS version: java script:alert(navigator.userAgent)
For platform: java script:alert(navigator.platform)
For pages viewed: java script:alert(history.length)
For color depth: java script:alert(window.screen.colorDepth)
For screen resolution: java script:alert('Your screen is:\n\n' + screen.width + ' pixels by ' + screen.height + ' pixels')

Now, there are probably hundreds of other tricky neat little tips I could add, and if you would like to add some of your own, feel free to use the comments feature of the this tutorial to add your comments....however, these seem to be the easiest, quickest and most requested.

Enjoy!