in some other language have a concept e.i "auto postback"
So, in Ruby on rails is there any such option e.i "auto postback"
or same as "auto postback"
basically what i want ot do is that i have 2 select box
One for "Industry" and other for "Chemical"
1st we show all the industry in "Industry" select box.
if we select any 1 industry from there, then the corrosponding
chemicals will b shown in the "chemical" select box...
please help me any one....