Autocomplete: code improvements for multiple demo

demos/autocomplete/multiple.html

@@ -16,7 +16,7 @@
 			return val.split(/,\s*/);
 		}
 		function extractLast(term) {
-			return split(term)[split(term).length - 1];
+			return split(term).pop();
 		}
 
 		$("#birds").autocomplete({
@@ -27,7 +27,7 @@
 			},
 			search: function() {
 				// custom minLength
-				var term = extractLast($(this).val());
+				var term = extractLast(this.value);
 				if (term.length < 2) {
 					return false;
 				}
@@ -37,14 +37,14 @@
 				return false;
 			},
 			select: function(event, ui) {
-				var terms = split( $(this).val() );
+				var terms = split( this.value );
 				// remove the current input
 				terms.pop();
 				// add the selected item
 				terms.push( ui.item.value );
 				// add placeholder to get the comma-and-space at the end
 				terms.push("");
-				$(this).val( terms.join(", ") );
+				this.value = terms.join(", ");
 				return false;
 			}
 		});