//-------- gifs tauschen -----//
function yellow(button){
	switchColor(button,".gif");
}
function red(button){
	switchColor(button,"_red.gif");
}
function switchColor(button,src){

	src = "../pics/navigation/"+button+src;
	
	if(document.images[button]!=null)
		document.images[button].src= src;
		
	if(window.name != "bottom"){
		var image = top.frames[4].document.images[button];
		if(image != null)
			image.src=src;
	}
}
//--------------------------------------------------

//----------- popups --------------------------------
function popup(url){
	return popupAll(800,600,url);
}

function popupAll(w,h,url){
	var win = window.open(url,"","resizable=1,dependent=1,scrollbars=1,width="+w+",height="+h);
	win.moveTo((screen.availWidth-w)/2,(screen.availHeight-h)/2);
	return win;
}
//---------------------------------------------------------------
/*
// Namen und Nummer der Frames ausgeben
function testFrames(){
var names = "";
for(var i=0; i < top.frames.length; i++)
names += top.frames[i].name+"  "+i+"\n";
alert(names);
}
*/