Homework1 of Software Testing-- an error from past project

We've all made mistakes in our work especially when there is something about coding in it. An error from the website project in last semester virtually drove me crazy.There was something wrong with my paging function on my website but the error didn't happen all the time, which means it's exceedingly difficult to figure out the accurate cause of the error. Although it's a relatively independent function, the data I got from the user input still needs to be modified to match the function, so it's pretty unlikely to change mere the paging function without modifing other parts of my website. So I had to try a variety of input to find out the exact cause of the error and eventually I managed to fixed it. It was a logical error that prevents the website showing the correct layout of paging when there is too much input.