destination=false;
defaultstatus="Umwelt und Technik";

function hilite(datei){
	window.status = datei;
	document.images[datei].src = bilder[datei][1].src;
}

function delite(datei){
	document.images[datei].src = bilder[datei][0].src;
	window.status = defaultstatus;
}

function hisBack(){
	history.back();
}

bilder=new Array;

function preload(datei,pfad,dateityp){
		path = pfad;
		data = datei;
		bilder[datei]=new Array;
		bilder[datei][0] = new Image();
		bilder[datei][0].src = pfad + datei + "_off." + dateityp;
		bilder[datei][1] = new Image();
		bilder[datei][1].src = pfad + datei + "_on." + dateityp;
}

function opWin(winUrl,winName,winX,winY,winFeatures) {
	  var newWin;
	  var randNum;
		if(!newWin||newWin.closed){
			winTop=(screen.height-winY)/2;
			winLeft=(screen.width-winX)/2;
			randNum=Math.round(Math.random()*1000000);
			winRandName=winName+randNum;
			newWin=window.open(winUrl,winRandName,'width='+winX+',height='+winY+',top='+winTop+',left='+winLeft+','+winFeatures);
		}
	// window.setTimeout("newWin.focus()",500);
	newWin.focus();
}

function opWinEx(winUrl,posX,posY,winWidth,winHeight) {
	  var newWin;
		if(!newWin||newWin.close){
			winTop=(posY-winHeight/2);
			winLeft=(posX-winWidth/2);
			newWin=window.open(winUrl,0,'width='+winWidth+',height='+winHeight+',top='+winTop+',left='+winLeft+',scrollbars=yes');
		}
		newWin.focus();
}