function oppna(url,wname,w,h,scroll) {
	var fonster = new Array;
	var x = 0; var y = 0;
	if(parseInt(navigator.appVersion) > 3) {
	x = (screen.availWidth - w) / 2; y = (screen.availHeight - h) / 2;
	}
	
	if(scroll==true){var scrollbars=1;} else {var scrollbars=0;}
	
	if(parseInt(navigator.appVersion) > 3 || navigator.appName == 'Netscape') {
	if(!fonster[wname] || fonster[wname].closed) {
	fonster[wname] = window.open(url, wname, 'scrollbars=' + scrollbars +  ',resizable=no,status=no,height= ' + h + ',width=' + w + ',top=' + y + ',left=' + x);
	fonster[wname].location.href = url;
	fonster[wname].focus();
	} else {
	fonster[wname].location.href = url;
	fonster[wname].focus();
	}
	}else{
	location.href = url;
	 }
}//end function