zoneminder/web/skins/classic/views/js/zones.js

var streamCmdParms = "view=request&request=stream&connkey="+connKey;
var streamCmdReq = new Request.JSON( { url: monitorUrl, method: 'post', timeout: AJAX_TIMEOUT, link: 'cancel' } );

function streamCmdQuit( action ) {
  if ( action )
    streamCmdReq.send( streamCmdParms+"&command="+CMD_QUIT );
}