jquery and updating ui

content.js

@@ -1,18 +1,25 @@
-var elements = document.getElementsByClassName('rwd-table results');
-var table = elements[0];
-var header = table.tHead.children[0];
+$(document).ready( function() {
+    $("table thead th:nth-child(5)").after('<th scope=col>Rating</th>');
+    $('table').find('tr').each(function(){
+    	var rating;
+    	var profname = $(this).find('td').eq(4).text();
+    	var profurl = $(this).find('td a').prop('href');
+    	if(profname == ""){
+    		//console.log("No Professor");
+    		rating = "No Prof :(";
+    	} else {
+    		console.log(profurl);
+    		//getProfessorFullName(profurl);
+    		console.log(profname);
+    		rating = "Hello";
+    	}
+        $(this).find('td').eq(4).after('<td data-th="Rating"><a href="http://example.com">'+rating+'</a></td>');
+    });
+});
 
-var th = document.createElement('th');
-th.innerHTML = "Rating";
-header.insertBefore(th,header.children[5]);
 
-var tableBody = table.getElementsByTagName('tbody')[0];
-tr = tableBody.getElementsByTagName("tr");
-for (i = 0; i < tr.length; i++) {
-		if(!(tr[i].children.length == 1)){
-		var td = document.createElement('td');
-		var newContent = document.createTextNode(Math.random()); 
-		td.appendChild(newContent);
-		tr[i].insertBefore(td,tr[i].children[5]);
-	}
-}
+
+function getProfessorFullName(profurl){
+}
+
+//http://www.ratemyprofessors.com/search.jsp?queryBy=teacherName&schoolName=university of texas at austin&query="+url+"&facetSearch=true"

manifest.json

@@ -4,14 +4,12 @@
   "name": "UT Course Extension",
   "version": "0.1.0",
   "description": "Chrome Extension to show more information on the UT Course catalog",
- 
+  "permissions": [
+		"*://*.ratemyprofessors.com/*"
+	],
   "content_scripts": [{
     "css": ["styles.css"],
-    "js": ["content.js"],
+    "js": ["jquery-3.3.1.min.js","content.js"],
     "matches": ["https://utdirect.utexas.edu/apps/registrar/course_schedule/*"]
-  }],
-  "background": {
-		"scripts": ["content.js"],
-		"persistent": false
-	}
+  }]
 }