var navigateToNewPage = false;
var activeMenuElement = null;
var activeSubMenuElement = null;

//****************************************
function initMainFrames()
{
	//See if there is a bookmark hash on the page URL.
	var bookmark = location.hash;
	if (bookmark) bookmark = bookmark.substring(1);
	//If we have a bookmark, load that as the initial state.
	if (!bookmark)
	{
		dojo.widget.byId("mainframe").setUrl("welcome.htm");
		dojo.undo.browser.setInitialState({changeUrl: "", handle: navigate});
	}
	else
	{
		dojo.undo.browser.setInitialState({changeUrl: bookmark, handle: navigate});
		var mainframe = dojo.widget.byId("mainframe");
		mainframe.addOnLoad(function()
			{
				navigateInfoFrame(bookmark,false);
			});
		mainframe.setUrl("main.htm");
	}
}

function navigate(direction)
{
	if (this.changeUrl)
	{
		var url = this.changeUrl;
		if (dojo.widget.byId("mainframe").href != "main.htm")
		{
			dojo.widget.byId("mainframe").setUrl("main.htm");
			dojo.widget.byId("mainframe").addOnLoad(function(){navigateInfoFrame(url,false);});
		}
		else
		{
			navigateInfoFrame(url,false);
		}
	}
	else
	{
		dojo.widget.byId("mainframe").setUrl("welcome.htm");
	}
}

function loadbanner(menu)
{
	dojo.widget.byId("mainbanner").setContent("<img src=\"images/heading_" + menu + ".gif\">");
}

function loadinfo(infofile)
{
	dojo.widget.byId("infoframe").setUrl(infofile);
}

function loadsubmenu(submenufile, submenu)
{
	var subMenu = dojo.widget.byId("submenu");
	if (submenu == null)
	{
		subMenu.setContent("");
	}
	else
	{
		subMenu.addOnLoad(function() 
			{
			if (activeSubMenuElement != null && activeSubMenuElement != submenu && dojo.byId(activeSubMenuElement))
				dojo.byId(activeSubMenuElement).style.backgroundImage = "";
			activeSubMenuElement = findMenuElement("submenulink", submenu).id;
			if (dojo.byId(activeSubMenuElement).style.backgroundImage == "")
				dojo.byId(activeSubMenuElement).style.backgroundImage = "url(images/buzga.gif)";
			});
		
		subMenu.setUrl(submenufile);
	}
}

function navigateMainFrame()
{
	try
	{
		var mf = dojo.widget.byId("mainframe");
		mf.addOnLoad(function(){navigateInfoFrame('michelehof_familie',true);});
		mf.setUrl("main.htm");
	}
	catch (e)
	{
	}
}

function navigateInfoFrame(file, setHistory)
{
	try
	{
		var erg = /(\w*)_(\w*)/.exec(file);
		var m;
		var sm = null;
		if (erg)
		{
			m = erg[1];
			sm = m + "_" + erg[2];
		}
		else
			m = file;
		loadbanner(m);
		loadsubmenu("submenu_" + m + ".htm", sm);
		if (sm != null)
			loadinfo("info_" + sm + ".htm");
		else
			loadinfo("info_" + m + ".htm");
			
		if (activeMenuElement != null && activeMenuElement != m)
			dojo.byId(activeMenuElement).style.backgroundImage = "";
		activeMenuElement = findMenuElement("menulink", m).id;
		if (dojo.byId(activeMenuElement).style.backgroundImage == "")
			dojo.byId(activeMenuElement).style.backgroundImage = "url(images/buzga.gif)";
			
		if (setHistory) 
		{
			dojo.undo.browser.addToHistory({changeUrl: file, handle: navigate});		
		}
		
	}
	catch (e)
	{
	alert("Fehler:" + e.description);
	}	
}

function findMenuElement(menuclass, id)
{
	var elements = document.getElementsByTagName("td");
	var i;
	for (i = 0; i < elements.length; i++)
	{
		if (elements[i].className == menuclass)
		{
			if (elements[i].id == id) return elements[i];
		}
	}
	return null;
}

//Mousehandler events
function showBuzga(elem)
{
	elem.style.backgroundImage = "url(images/buzga_orange.gif)";
}

function hideBuzga(elem)
{
	if ((elem.className == "menulink" && activeMenuElement != null && elem.id == activeMenuElement)
	|| (elem.className == "submenulink" && activeSubMenuElement != null && elem.id == activeSubMenuElement)) 
		elem.style.backgroundImage = "url(images/buzga.gif)";
	else
		elem.style.backgroundImage = "";
}

function mousehandler(classname)
{
	var elements = document.getElementsByTagName("td");
	for (i = 0; i < elements.length; i++)
	{
		if (elements[i].className == classname)
		{
			elements[i].onmouseover = function () {showBuzga(this);};
			elements[i].onmouseout = function () {hideBuzga(this);};
			elements[i].onclick = function(e) {
					var parent = dojo.html.getParentByType(dojo.html.getEventTarget(e),"td");
					if (dojo.html.getAttribute(parent,"href"))
						navigateInfoFrame(dojo.html.getAttribute(parent,"href"),true);
					else
						navigateInfoFrame(parent.id,true);
				};
		}
	}
}