function newwin(sUrl,iWidth,iHeight,scroll){
	window.open(sUrl,'','toolbar=no,location=no,status=no,directories=no,menubar=no,scrollbars='+scroll+',resizable=no,height='+iHeight+',width='+iWidth);
}

function preloadImages(){
	var d=document; if(d.images){ if(!d.p) d.p=new Array();
	var i,j=d.p.length,a=preloadImages.arguments; for(i=0; i<a.length; i++)
	if (a[i].indexOf("#")!=0){ d.p[j]=new Image; d.p[j++].src=a[i];}}
}

function get_random_Bg(totalimg){
    var ranNum1 = Math.round(Math.random()*(totalimg-1));
    return ranNum1;
}

function getBgImg(){
	var bgimg=new Array(9)
	bgimg[0]="images/ivan_intro.jpg";
	bgimg[1]="images/rupi_intro.jpg";   
	bgimg[2]="images/alexerich2_intro.gif";
	bgimg[3]="images/pflanzen_gruppe1_intro.jpg";
	bgimg[4]="images/markuspeter_intro.jpg";
	bgimg[5]="images/buergermeister_intro.jpg";
	bgimg[6]="images/guenther_intro.jpg";
	bgimg[7]="images/kathele_intro.jpg";
	bgimg[8]="images/maiomai1_intro.jpg";
	bgimg[9]="images/pflanzen_gruppe_intro.jpg";


	preloadImages('+ bgimg[0] +','+ bgimg[1] +','+ bgimg[2] +','+ bgimg[3] +','+ bgimg[4] +','+ bgimg[5] +','+ bgimg[6] +','+ bgimg[7] +','+ bgimg[8] +','+ bgimg[9] +','+ bgimg[10] +');

	var whichBg=get_random_Bg(bgimg.length);
	document.getElementById('bgImg').src = bgimg[whichBg];
}



function chgImg(div,SubjectName,ImgNum,totImgs){
	if (ImgNum != 1){
		BackStr = "<<  <a href=javascript:chgImg('" + div + "','" + SubjectName + "'," + (ImgNum - 1) + "," + totImgs + ");>zurück</a>";
	}else{
		BackStr = " ";
	}
	if ((totImgs) != ImgNum){
		NextStr = "<a href=javascript:chgImg('" + div + "','" + SubjectName + "'," + (ImgNum + 1) + "," + totImgs + ");>weiter</a>  >>";
	}else{
		NextStr = " ";
	}
	document.getElementById(div).innerHTML = "<a href=javascript:location.reload();><img src=images/galleries/" + SubjectName + "/" + ImgNum + ".jpg></a><div id=GalleryNav>" + BackStr + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;" + NextStr + "</div>";
}