Charts with setting starting and ending point on x (time)

Hi, there. i would like to make something like this:

http://img392.imageshack.us/img392/9474/outputuu8.jpg

[IMG="http://img392.imageshack.us/img392/9474/outputuu8.jpg"[/IMG]

I have a lot of starting and ending times and i would like to add it on a square on axis x (time like) and i want to group the multiples on the same line (alpha, beta etc).

I'm not so good on charting so any hint, advice or oppinion will be appriciated.

Thanks in advance.
Yuri.

Or, you could download a ready-made template for free from here:

http://www.vertex42.com/ExcelTemplat...ntt-chart.html