--- Revision 570
+++ Revision 572
@@ -26,6 +26,10 @@
 
 UI.IframeShim = Class.create(UI.Options, {
   
+  options: {
+    parent: document.body
+  },
+
   /*
     Method: initialize
     Constructor
@@ -37,13 +41,14 @@
     Returns:
       this
   */
-  initialize: function() {
+  initialize: function(options) {
+    this.setOptions(options);
     this.element = new Element('iframe', {
       style: 'position:absolute;filter:progid:DXImageTransform.Microsoft.Alpha(opacity=1);',
       src: 'javascript:false;',
       frameborder: 0
     });
-    $(document.body).insert(this.element);
+    $(this.options.parent || document.body).insert(this.element);
   },
   
   /*
@@ -104,7 +109,7 @@
   */
   setBounds: function(bounds) {
     for (prop in bounds) {
-      bounds[prop] += 'px';
+      bounds[prop] = parseInt(bounds[prop]) + 'px';
     }
     this.element.setStyle(bounds);
     return this;