css - Set Modal window height based upon browser window size using Bootstrap -

how set max-height modal window 80% of current browser window size using bootstrap. thanks

one way achieve use wrapper. example use code this:

html

<div id="wrapper">     <!-- code here --> </div> 

css

#wrapper {     height: 80%; } 

so put #wrapper around of code (of course after body), , make max height of of content 80%.