Added an option to use custom container for autocomplete

doc/jquery.autocomplete.txt

@@ -184,6 +184,13 @@ useDelimiter  (default value: false)
     comma.  For example, you may want to allow the user to enter a comma separated list of values--and 
     each value will autocomplete without erasing the other delimited values in the input field. 
 
+resultsContainer (default value: null)
+    HTML element which will contain autocomplete. It will be created and appended to body if not provided.
+    Contains of this element is replaced with new autocomplete elements each time autocomplete shows up.
+
+autoPosition (default value: true)
+    Whether to position container of autocomplete automatically or not. If set to true, it will be aligned
+    right under input.
 
 More advanced options :
 =======================

src/jquery.autocomplete.js

@@ -80,7 +80,8 @@
         useDelimiter: false,
         delimiterChar: ',',
         delimiterKeyCode: 188,
-        processData: null
+        processData: null,
+        autoPosition: true
     };
 
     /**
@@ -311,13 +312,20 @@
          */
         this.dom.$elem.attr('autocomplete', 'off').addClass(this.options.inputClass);
 
-        /**
-         * Create DOM element to hold results, and force absolute position
-         */
-        this.dom.$results = $('<div></div>').hide().addClass(this.options.resultsClass).css({
-            position: 'absolute'
-        });
-        $('body').append(this.dom.$results);
+        if (this.options.resultsContainer) {
+            /**
+             * Assume that container is already in DOM
+             */
+            this.dom.$results = $(this.options.resultsContainer).hide().addClass(this.options.resultsClass);
+        } else {
+            /**
+             * Create DOM element to hold results, and force absolute position
+             */
+            this.dom.$results = $('<div></div>').hide().addClass(this.options.resultsClass).css({
+                position: 'absolute'
+            });
+            $('body').append(this.dom.$results);
+        }
 
         /**
          * Attach keyboard monitoring to $elem
@@ -810,9 +818,11 @@
                 }
             }
 
-            // Always recalculate position before showing since window size or
-            // input element location may have changed.
-            this.position();
+            if (this.options.autoPosition) {
+                // Recalculate position before showing since window size or
+                // input element location may have changed.
+                this.position();
+            }
 
             this.dom.$results.html($ul).show();
             if (this.options.autoWidth) {