// initialize hacks whenever the page loads
window.onload = initializeHacks;


// setup an event handler to hide popups for generic clicks on the document
function initializeHacks() {
    // this ugly little hack resizes a blank div to make sure you can click
    // anywhere in the window for Mac MSIE 5
    if ((navigator.appVersion.indexOf('MSIE 5') != -1) 
	&& (navigator.platform.indexOf('Mac') != -1)
	&& getStyleObject('blankDiv')) {
	window.onresize = explorerMacResizeFix;
    }
    resizeBlankDiv();
    // this next function creates a placeholder object for older browsers
    createFakeEventObj();
}



function createFakeEventObj() {
    // create a fake event object for older browsers to avoid errors in function call
    // when we need to pass the event object to functions
    if (!window.event) {
	window.event = false;
    }
} // createFakeEventObj



function resizeBlankDiv() {
    // resize blank placeholder div so IE 5 on mac will get all clicks in window
    if ((navigator.appVersion.indexOf('MSIE 5') != -1) 
	&& (navigator.platform.indexOf('Mac') != -1)
	&& getStyleObject('blankDiv')) {
	getStyleObject('blankDiv').width = document.body.clientWidth - 20;
	getStyleObject('blankDiv').height = document.body.clientHeight - 20;
    }
}

function explorerMacResizeFix () {
    location.reload(false);
}
// ******************************
// end of hacks and workarounds *
// ******************************

function getStyleObject(objectId, doc) {
    // cross-browser function to get an object's style object given its id
    if(document.getElementById && document.getElementById(objectId)) {
	// W3C DOM
	return document.getElementById(objectId).style;
    } else if (document.all && document.all(objectId)) {
	// MSIE 4 DOM
	return document.all(objectId).style;
    } else if (document.layers && document.layers[objectId]) {
	// NN 4 DOM.. note: this won't find nested layers
		return getObjNN4(document,objectId);
    } else {
	return false;
    }
} // getStyleObject

function changeObjectVisibility(objectId, newVisibility) {
    // get a reference to the cross-browser style object and make sure the object exists
    var styleObject = getStyleObject(objectId, document);
    if(styleObject) {
	styleObject.visibility = newVisibility;
	return true;
    } else {
	//we couldn't find the object, so we can't change its visibility
	return false;
    }
} // changeObjectVisibility

function getElementLeft(Elem) {
	var elem;
	if(document.getElementById) {
		//msie5+ and dom
		var elem = document.getElementById(Elem);
	} else if (document.all){
		// msie4
		var elem = document.all[Elem];
	}
	xPos = elem.offsetLeft;
	tempEl = elem.offsetParent;
  	while (tempEl != null) {
  		xPos += tempEl.offsetLeft;
  		tempEl = tempEl.offsetParent;
  	}
	return xPos;
}

function getElementTop(Elem) {
	if(document.getElementById) {
		// MSIE5+ AND DOM
		var elem = document.getElementById(Elem);
	} else if (document.all) {
		//MSIE4
		var elem = document.all[Elem];
	}
	yPos = elem.offsetTop;
	tempEl = elem.offsetParent;
	while (tempEl != null) {
  		yPos += tempEl.offsetTop;
  		tempEl = tempEl.offsetParent;
  	}
	return yPos;
}

function findImage(name, doc) {
// For NS4.x
	var i, img;
	// loop through all images in document or layer
	for (i = 0; i < doc.images.length; i++) {
  		// is this the image we're looking for?
    	if (doc.images[i].name == name) {
			// if so return value	
			return doc.images[i];
		}
	}
	// loop thropugh all layers in the document or layer
	for (i = 0; i < doc.layers.length; i++) {
		// recurse function to search this layer
    	if ((img = findImage(name, doc.layers[i].document)) != null) {
			// if the image is there, return it
			img.container = doc.layers[i];
			return img;
    	}
	}
	// return failure
	return null;
}

function getImage(name) {
// For NS4.x
	if (document.layers) {
		//use the function above to find an image and return a value...
    	return findImage(name, document);
	}
	// ... or return failure
	return null;
}

function getImagePageLeft(img) {
// For NS4.x
	var x, obj;
	if (document.layers) {
    	if (img.container != null)
			return img.container.pageX + img.x;
		else
			return img.x;
  	}
	return -1;
}

function getImagePageTop(img) {
// For NS4.x
	var y, obj;
	if (document.layers) {
		if (img.container != null)
			return img.container.pageY + img.y;
		else
			return img.y;
	}
	return -1;
}

function getObjNN4(obj,name)
{
	var x = obj.layers;
	var foundLayer;
	for (var i=0;i<x.length;i++)
	{
		if (x[i].id == name)
		 	foundLayer = x[i];
		else if (x[i].layers.length)
			var tmp = getObjNN4(x[i],name);
		if (tmp) foundLayer = tmp;
	}
	return foundLayer;
}



// Openclass: 00.02


 function Ausblenden(div_id) {
   MultiAusblenden(5,div_id);
   var the_div = getStyleObject(div_id);
   if (the_div != false) {
     if (document.getElementById(div_id).style.display != "none") {
      document.getElementById(div_id).style.display="none";
     } else {
      document.getElementById(div_id).style.display="inline";
     }
   }
 }

 function Initialize() {
   MultiAusblenden2(5,'MClass2');
 }

 function MultiAusblenden(numberOfElems,butNot) {
   var i = 1;
   var prevState = document.getElementById(butNot).style.display;
   for( i ; i <= numberOfElems ; i++ ) {
     document.getElementById('MClass'+i).style.display="none";
   }
   if(butNot!="") {
    document.getElementById(butNot).style.display=prevState;
   }
 }

 function MultiAusblenden2(numberOfElems,butNot) {
   var i = 1;
   for( i ; i <= numberOfElems ; i++ ) {
     document.getElementById('MClass'+i).style.display="none";
   }
   if(butNot!="") {
    document.getElementById(butNot).style.display="inline";
   }
 }