It can be difficult to use (webpage) sliders that cover a large range with fine granularity. On the one hand, it is easy to move across the range. On the other hand, it is difficult to locate the exact point one wants, assuming a fine enough granularity. I was thinking that a magnify effect around the cursor could solve this problem (assuming the problem really exists). I looked for existing solutions or ideas via google, but couldn't find anything. Any suggestions here?