Record time at different stage / popup window

Hi all,

I have several questions and wondered if you could help me.

1) I have this java code for a pop-up window, but I would like to know, when they close this window.
So when I extract data on excel, I would like to have a column where it shows me when they closed this popup window.

Qualtrics.SurveyEngine.addOnReady(function()
{ jQuery("[id*='dialog']" ).dialog({ autoOpen: false});
var delayTime = 3000; //This is the time of delay
setTimeout(function(){jQuery("[id*='dialog']" ).dialog({ autoOpen: true, draggable:true, scroll:false, height:'auto', width:'750x',
open: function(event,ui){
$(event.target).parent().css('position', 'fixed');
$(event.target).parent().css('top', '5px');
$(event.target).parent().css('left', '100px');
}
})}, delayTime);
});

2) On this same page, I want a button that people can click on see the same pop-up window. But I don't want to button to be displayed before they see the popup from 1). The code I have for this right now is below. I also want to record the time (1) when they click on this button, and (2) when they close this popup.

Qualtrics.SurveyEngine.addOnReady(function()
{jQuery("[id*='dialog']" ).dialog({ autoOpen: false});
// jQuery('body').on('click','.ui-widget-overlay',function(){ jQuery("[id*='dialog']").dialog('close'); });

jQuery( "#btn1" ).click(function() {
jQuery("#dialog").dialog( "option", "modal", true );
jQuery("#dialog").dialog( "open" );});

});

3. Lastly, it would be great if I can record time when they click on the choice. (this is multiple choice question).

THANK YOU SO MUCH IN ADVANCE!!