/*
 * Ersetzt eine CSS-Klasse durch eine andere
 *
 * @author Alexander Fuchs 
 */
function replaceClassNames (oldClass, newClass)
{
	elements = document.getElementsByClassName(oldClass);
	for(itemx in elements)
		if(elements[itemx].className) 
		{ 
			elements[itemx].addClassName(newClass);
			elements[itemx].removeClassName(oldClass);
		}
	
	// Alte Version, ging aber nicht in FF3
	/*document.getElementsByClassName(old_class).each( 
		function(item){
			item.className = new_class;																 
		});*/
	
}

/*
 * Blendet ein Element anhang der CSS-Klasse aus
 *
 * @author Alexander Fuchs 
 */
function displayNoneByClassName (class_name)
{
	elements = document.getElementsByClassName(class_name);
	for(itemx in elements)
		if(elements[itemx].style) elements[itemx].style.display = 'none';
	
}



function overallDiv ()
{
	// Erstelle die OverlayDiv
	var objBody = document.getElementsByTagName("body").item(0);
		
	var objOverlay = document.createElement("div");
	objOverlay.setAttribute('id','overlay');
	//objOverlay.style.display = 'none';
	objOverlay.onclick = function() { alert('test'); }
	objBody.appendChild(objOverlay);
}


function changeTab (selectedElement, displayIn, displayOut, tabActive, tabDeactive)
{
	// Haue alle erstmal raus
	displayNoneByClassName(displayOut);

	// Markiere die Navigation
	replaceClassNames(tabActive, tabDeactive);

	$(selectedElement).addClassName(tabActive);

	// Zeige die DIV
	$(displayIn).style.display = '';
}

var running = false;
function changeTabSpeedy (selectedElement, displayIn, displayOut, tabActive, tabDeactive)
{

	displayNoneByClassName(displayOut);
	
	// Markiere die Navigation
	replaceClassNames(tabActive, tabDeactive);

	$(selectedElement).addClassName(tabActive);

	// Zeige die DIV
	$(displayIn).style.display = '';
	
	
}




//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.com
//
function getPageScroll(){

	var xScroll, yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
		xScroll = self.pageXOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
		xScroll = document.documentElement.scrollLeft;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
		xScroll = document.body.scrollLeft;	
	}

	arrayPageScroll = new Array(xScroll,yScroll) 
	return arrayPageScroll;
}

// -----------------------------------------------------------------------------------

//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.com
// Edit for Firefox by pHaez
//
function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = window.innerWidth + window.scrollMaxX;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	
//	console.log(self.innerWidth);
//	console.log(document.documentElement.clientWidth);

	if (self.innerHeight) {	// all except Explorer
		if(document.documentElement.clientWidth){
			windowWidth = document.documentElement.clientWidth; 
		} else {
			windowWidth = self.innerWidth;
		}
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

//	console.log("xScroll " + xScroll)
//	console.log("windowWidth " + windowWidth)

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = xScroll;		
	} else {
		pageWidth = windowWidth;
	}
//	console.log("pageWidth " + pageWidth)

	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}

// -----------------------------------------------------------------------------------
function getPosition(obj) 
{
	var pos = { x:0, y:0 };
	
	do {
		pos.x += obj.offsetLeft;
		pos.y += obj.offsetTop;
	} while (obj = obj.offsetParent);
	
	return pos;
}