![enter image description here](https://i.stack.imgur.com/XQW4r.jpg)I am working on my school application using jsp and web-development is new to me.
At this moment I am stumbled upon the issue:

The process should be this:

I have a Dropdown box with multiple values.
For example:

Room: 111 | Building: ACC | Capacity: 15

Room: 111 | Building: ACD | Capacity: 25

Room: 151 | Building: ACC | Capacity: 11

Room: 113 | Building: ACC | Capacity: 15

When user selects ANY option nothing should happen. 

Next to the dropdown box, I have a `<a href link..>` which sais "see the chart".

When user presses "see the chart" the following process should take place:

1. String in selected box should be separated and Room# and Bulding# must be extracted into separate strings
2. new windowshould open with this link:
room\_chart.jsp?room=111&building=ACC (for example)

I know how to split the string and do it in general, but I don't know how to dynamically do it without reloading the page... I guess I would need to implement the JavaScript?