static/tinymce/plugins/inlinepopups/editor_plugin_src.js
function() {
			var fw, ix = 0;
			// Find front most window and focus that
			each (this.windows, function(w) {
				if (w.zIndex > ix) {
					fw = w;
					ix = w.zIndex;
				}
			});
			return fw;
		}
function() {
			var fw, ix = 0;
			// Find front most window and focus that
			each (this.windows, function(w) {
				if (w.zIndex > ix) {
					fw = w;
					ix = w.zIndex;
				}
			});
			return fw;
		}
Find front most window