amend to jplot or graph program CSS jquery javascript

I think this should be fairly simple for someone with skills in this area, but please read carefully: I am using jplot to dynamically create graphs from a mysql database [login to view URL] I want to add the ability to create a colored range (green) in jplot like the picture here It doesn't appear that jplot has this feature. I need someone to create this feature for jplot (probably with a css overlay), or advise on and implement a alternative graphing program that has a range feature. Need this completed inside 1-2 days