function change_pic(img) {
var thumbname = img.src;
var mainname = document.getElementById("haus_view_main_pic").src;
var title = document.getElementById("haustitle");
var grundrissabfrage = thumbname.search("nobutton");

	if (grundrissabfrage != -1)	{
		document.getElementById("kfw_button").style.display="none";
	
	} else	{
	document.getElementById("kfw_button").style.display="block";
	
	}

	for (var i = 0; i < anzahl; i++) {
		
		for (var Pfad in TitlesLoc[i])	{
			if(mainname.search(Pfad) != -1){
			img.title=TitlesLoc[i][Pfad];
			}
		}
	}

	for (var u = 0; u < anzahl; u++) {
		
		for (var Pfad1 in TitlesLoc[u])	{
			if(thumbname.search(Pfad1) != -1){
			title.innerHTML = TitlesLoc[u][Pfad1];
			}
		}
	}	

var dummy = mainname.search("haeuser/")+7;
//5 ist die Zeichenlänge von f1/A/
var getpfad = mainname.substr(dummy,5);
thumbname = thumbname.replace("thumbs/", "");
mainname = mainname.replace(getpfad,getpfad+"/thumbs");

document.getElementById("haus_view_main_pic").src=thumbname;
thumbname = img.src=mainname;
}