added subject and description for downloading event

assets/js/script.js

 
 });
 function downloadEvent(){
-
+	var subject = $('#subject').val();
+	var subject = $('#description').val();
+	var begin = $('#start-date').val();
+	var end = $('#end-date').val();
+	var cal = ics();
+	cal.addEvent(subject, description, location, begin, end);
+	//cal.addEvent(subject, description, location, begin, end); // yes, you can have multiple events :-)
+	cal.download(filename)
 }

layouts/events/single.html

         <div class="post-single-content">
           {{ .Content }}
         </div>
-        <button class="clndr btn btn-main" onclick="downloadEvent()"><i class="ti-calendar"></i>Block Calender</button>
+        <input type="hidden" id="subject" value="{{.Title }}"/>
+        <input type="hidden" id="description" value="{{.Content }}"/>
+        <input type="hidden" id="location" value="Kolkata, IN"/>
+        <input type="hidden" id="start-date" value="{{.Params.event_start_date }}"/>
+        <input type="hidden" id="end-date" value="{{.Params.event_end_date }}"/>
+        <button class="clndr btn btn-main" onclick="downloadEvent()">
+        <i class="ti-calendar"></i>Block Calender</button>
         {{ if site.Params.post_share }}
         {{ partial "post-share.html" . }}
         {{ end }}