dojo.provide("dijit._base.window");

dijit.getDocumentWindow = function(doc){
	//	summary
	// 	Get window object associated with document doc

	// With Safari, there is not way to retrieve the window from the document, so we must fix it.
	if(dojo.isSafari && !doc._parentWindow){
		/*
			This is a Safari specific function that fix the reference to the parent
			window from the document object.
		*/
		var fix=function(win){
			win.document._parentWindow=win;
			for(var i=0; i<win.frames.length; i++){
				fix(win.frames[i]);
			}
		}
		fix(window.top);
	}

	//In some IE versions (at least 6.0), document.parentWindow does not return a
	//reference to the real window object (maybe a copy), so we must fix it as well
	//We use IE specific execScript to attach the real window reference to
	//document._parentWindow for later use
	if(dojo.isIE && window !== document.parentWindow && !doc._parentWindow){
		/*
		In IE 6, only the variable "window" can be used to connect events (others
		may be only copies).
		*/
		doc.parentWindow.execScript("document._parentWindow = window;", "Javascript");
		//to prevent memory leak, unset it after use
		//another possibility is to add an onUnload handler which seems overkill to me (liucougar)
		var win = doc._parentWindow;
		doc._parentWindow = null;
		return win;	//	Window
	}

	return doc._parentWindow || doc.parentWindow || doc.defaultView;	//	Window
}
