function dummy() {}

function changeVisibility(id) {
	if(document.getElementById(id).style.visibility=='visible') {
		document.getElementById(id).style.visibility='hidden';
	}
	else {
		document.getElementById(id).style.visibility='visible';
	}
}

function writeImages(anzahl,ordner) {
	
	anzahl-=1;

	var imageA = Math.round(Math.random()*anzahl)+1;
	var imageB=0;
	while((imageB = Math.round(Math.random()*anzahl)+1)==imageA) {};
	var imageC=0;
	while(((imageC = Math.round(Math.random()*anzahl)+1)==imageB) || (imageC==imageA)) {};
	
//	document.write("<div class='DIVimg' id='DIVimgA' style=\"visibility:hidden;\"><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"changeVisibility('DIVimgA');\"><img src='images/tiles/"+ordner+"/"+imageA+"gr.jpg' border='0'></a></div>");
//	document.write("<div class='DIVimg' id='DIVimgB' style=\"visibility:hidden;\"><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"changeVisibility('DIVimgB');\"><img src='images/tiles/"+ordner+"/"+imageB+"gr.jpg' border='0'></a></div>");
//	document.write("<div class='DIVimg' id='DIVimgC' style=\"visibility:hidden;\"><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"changeVisibility('DIVimgC');\"><img src='images/tiles/"+ordner+"/"+imageC+"gr.jpg' border='0'></a></div>");
	document.write("<div class='DIVimageA'><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"openWindow('images/tiles/"+ordner+"/"+imageA+"gr.jpg');\"><img src='images/tiles/"+ordner+"/"+imageA+".gif' border='0'></a></div>");
	document.write("<div class='DIVimageB'><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"openWindow('images/tiles/"+ordner+"/"+imageB+"gr.jpg');\"><img src='images/tiles/"+ordner+"/"+imageB+".gif' border='0'></a></div>");
	document.write("<div class='DIVimageC'><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"openWindow('images/tiles/"+ordner+"/"+imageC+"gr.jpg');\"><img src='images/tiles/"+ordner+"/"+imageC+".gif' border='0'></a></div>");

}

function writeLessImages(anzahl,ordner) {
	
	anzahl-=1;

	var imageA = Math.round(Math.random()*anzahl)+1;
	var imageB=0;
	while((imageB = Math.round(Math.random()*anzahl)+1)==imageA) {};
	
//	document.write("<div class='DIVimg' id='DIVimgA' style=\"visibility:hidden;\"><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"changeVisibility('DIVimgA');\"><img src='images/tiles/"+ordner+"/"+imageA+"gr.jpg' border='0'></a></div>");
//	document.write("<div class='DIVimg' id='DIVimgB' style=\"visibility:hidden;\"><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"changeVisibility('DIVimgB');\"><img src='images/tiles/"+ordner+"/"+imageB+"gr.jpg' border='0'></a></div>");
	document.write("<div class='DIVimageA'><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"openWindow('images/tiles/"+ordner+"/"+imageA+"gr.jpg');\"><img src='images/tiles/"+ordner+"/"+imageA+".gif' border='0'></a></div>");
	document.write("<div class='DIVimageB'><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"openWindow('images/tiles/"+ordner+"/"+imageB+"gr.jpg');\"><img src='images/tiles/"+ordner+"/"+imageB+".gif' border='0'></a></div>");
}

function writeExtendedImages(anzahl,ordner) {
	
	anzahl-=1;

	var imageA = Math.round(Math.random()*anzahl)+1;
	var imageB=0;
	while((imageB = Math.round(Math.random()*anzahl)+1)==imageA) {};
	var imageC=0;
	while(((imageC = Math.round(Math.random()*anzahl)+1)==imageB) || (imageC==imageA)) {};
	var imageD=0;
	while(((imageD = Math.round(Math.random()*anzahl)+1)==imageC) || (imageD==imageB) || (imageD==imageC)) {};
	
//	document.write("<div class='DIVimg' id='DIVimgA' style=\"visibility:hidden;\"><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"changeVisibility('DIVimgA');\"><img src='images/tiles/"+ordner+"/"+imageA+"gr.jpg' border='0'></a></div>");
//	document.write("<div class='DIVimg' id='DIVimgB' style=\"visibility:hidden;\"><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"changeVisibility('DIVimgB');\"><img src='images/tiles/"+ordner+"/"+imageB+"gr.jpg' border='0'></a></div>");
//	document.write("<div class='DIVimg' id='DIVimgC' style=\"visibility:hidden;\"><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"changeVisibility('DIVimgC');\"><img src='images/tiles/"+ordner+"/"+imageC+"gr.jpg' border='0'></a></div>");
//	document.write("<div class='DIVimg' id='DIVimgD' style=\"visibility:hidden;\"><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"changeVisibility('DIVimgD');\"><img src='images/tiles/"+ordner+"/"+imageD+"gr.jpg' border='0'></a></div>");
	document.write("<div class='DIVimageA'><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"openWindow('images/tiles/"+ordner+"/"+imageA+"gr.jpg');\"><img src='images/tiles/"+ordner+"/"+imageA+".gif' border='0'></a></div>");
	document.write("<div class='DIVimageB'><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"openWindow('images/tiles/"+ordner+"/"+imageB+"gr.jpg');\"><img src='images/tiles/"+ordner+"/"+imageB+".gif' border='0'></a></div>");
	document.write("<div class='DIVimageC'><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"openWindow('images/tiles/"+ordner+"/"+imageC+"gr.jpg');\"><img src='images/tiles/"+ordner+"/"+imageC+".gif' border='0'></a></div>");
	document.write("<div class='DIVimageD'><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"openWindow('images/tiles/"+ordner+"/"+imageD+"gr.jpg');\"><img src='images/tiles/"+ordner+"/"+imageD+".gif' border='0'></a></div>");
}

function writeImageA(anzahl,ordner) {
	anzahl-=1;
	var imageA = Math.round(Math.random()*anzahl)+1;
//	document.write("<div class='DIVimg' id='DIVimgA' style=\"visibility:hidden;\"><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"changeVisibility('DIVimgA');\"><img src='images/tiles/"+ordner+"/"+imageA+"gr.jpg' border='0'></a></div>");
	document.write("<div class='DIVimageA'><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"openWindow('images/tiles/"+ordner+"/"+imageA+"gr.jpg');\"><img src='images/tiles/"+ordner+"/"+imageA+".gif' border='0'></a></div>");

}
function writeImageB(anzahl,ordner) {
	anzahl-=1;
	imageB = Math.round(Math.random()*anzahl)+1;
//	document.write("<div class='DIVimg' id='DIVimgB' style=\"visibility:hidden;\"><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"changeVisibility('DIVimgB');\"><img src='images/tiles/"+ordner+"/"+imageB+"gr.jpg' border='0'></a></div>");
	document.write("<div class='DIVimageB'><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"openWindow('images/tiles/"+ordner+"/"+imageB+"gr.jpg');\"><img src='images/tiles/"+ordner+"/"+imageB+".gif' border='0'></a></div>");
}
function writeImageC(anzahl,ordner) {
	anzahl-=1;
	var imageC = Math.round(Math.random()*anzahl)+1;
//	document.write("<div class='DIVimg' id='DIVimgC' style=\"visibility:hidden;\"><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"changeVisibility('DIVimgC');\"><img src='images/tiles/"+ordner+"/"+imageC+"gr.jpg' border='0'></a></div>");
	document.write("<div class='DIVimageC'><a href=\"Javascript:dummy();\" onFocus=\"this.blur();\" onClick=\"openWindow('images/tiles/"+ordner+"/"+imageC+"gr.jpg');\"><img src='images/tiles/"+ordner+"/"+imageC+".gif' border='0'></a></div>");
}