Hi Spandy, The images are screen grab/crop of a much larger application I developed to graph environmental variables, The library I use is zedgraph, they do an asp .net version for graphing on the web but I dont have any experience in using that, going by the tutorial it seems syntactically similar to what I have used developing this in c#. Mostly its just configuring how your graphs look, also for the timestamp I store this in unixtime then convert when Im filling up the arrays of data, sorry I cant be of much help, I havent developed anything for the web that uses graphing.
check out A flexible charting library for .NET - CodeProject
the examples dont look that great but zedgraph is so configurable it doesnt take long to change the look of your graphs.