/********************************************************************
*  generated by H2G Internetagentur, CH-Aarau, www.h2g.ch, july05   *
********************************************************************/

var layer = 1;

function next() {

	var newlayer = layer+1;
	
	document.getElementById("content"+layer).style.visibility = "hidden";
	document.getElementById("content"+newlayer).style.visibility = "visible";

	layer++;
}

function last() {

	var newlayer = layer-1;

	document.getElementById("content"+layer).style.visibility = "hidden";
	document.getElementById("content"+newlayer).style.visibility = "visible";

	layer--;

}

function popup(url,w,h) {
	x = screen.availWidth/2-w/2;
	y = screen.availHeight/2-h/2;
	popupWindow = window.open(url,'','width='+w+',height='+h+',left='+x+',top='+y+',screenX='+x+',screenY='+y+',scrollbars=yes');
 }