Userscripts.org

I want to use GM_xmlhttpRequest to do an image search on Google. I was hoping to have the script generate a URL specific to my preferences. I did some research about Google search URL parameters but I'm unable to apply it to what I'm doing so far.

Anyone know of a userscript that does something similiar so I can look at the code?

Here's a sample URL that I tried but it only brings me to the Google image search page.

https://www.google.com/imghp?hl=en&tab=ii&imgty...

Here's an actual URL that works but I can't make out what some of the parameters do:

https://www.google.com/search?hl=en&as_st=y&biw...

Maybe I'll use Bing instead. Their URL parameters are easier to decipher.