I can't give the exact address that I am using, as it reveals information about the company I work for.
So I guess I'll explain the page itself. It has three input fields, each one corresponding to the parameters I mentioned (txtStyle, txtSize, txtColor). It also has a Submit button.
If the user goes to the page without the parameters in the address bar, it loads with those 3 input fields blank. The user then inputs the values into those 3 fields and Submits the form.
If the user HAS those 3 parameters in the address bar, the page Auto Submits with those 3 parameters in the input fields.
I hope that makes it a little clearer.