function FrameWechsel (url1,url2,url3,url4)
{
if  (url1 != 0)
	parent.frames[0].location.href=url1
if  (url2 != 0)
	parent.frames[1].location.href=url2
if  (url3 != 0)
	parent.frames[3].location.href=url3
if  (url4 != 0)
	parent.frames[4].location.href=url4
}

function SeitenAuswahl (nr, pre) {
var wert = pre + document.forms[nr].elements[0].options[document.forms[nr].elements[0].selectedIndex].value + ".html";
if (wert != (pre+"000"+".html")) {
	FrameWechsel(0,0,0,wert);
}
}