function winOpen(theURL,fname) {

	var popup_width 	=	815;
	var popup_heigth	=	600;

	var ns4			=	false;
	var ns6			=	false;
	var ie			=	false;

	if(document.layers) {
		ns4		=	true;
		ns6		=	false;
		ie		=	false;
		var pop_size_x	=	popup_width;
		var pop_size_y	=	popup_heigth;
	}
	if(document.documentElement) {
		ns4		=	false;
		ns6		=	true;
		ie		=	false;
		var pop_size_x	=	popup_width	+	6;
		var pop_size_y	=	popup_heigth	-	0;
	}
	if(document.all) {
		ns4		=	false;
		ns6		=	false;
		ie		=	true;
		var pop_size_x	=	popup_width	+	8;
		var pop_size_y	=	popup_heigth	-	0;
	}

	var xres	= 	screen.width;
	var yres 	= 	screen.height;

        var content_txt	=	"toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,width="+pop_size_x+",height="+pop_size_y;
        fenster		= 	window.open(theURL,fname,content_txt);

        if(ns4){
                xsize 	= 	window['fenster'].outerWidth;
                ysize 	= 	window['fenster'].outerHeight;
//alert('Popup Größe\n\nX='+pop_size_x+'\nY='+pop_size_y+'\n\n\nAbgefragte Größe\n\nX='+xsize+'\nY='+ysize);		
        }
        if(ns6){
                xsize 	= 	window['fenster'].outerWidth;
                ysize 	= 	window['fenster'].outerHeight;
//alert('Popup Größe\n\nX='+pop_size_x+'\nY='+pop_size_y+'\n\n\nAbgefragte Größe\n\nX='+xsize+'\nY='+ysize);
        }
        if(ie){
                xsize 	= 	pop_size_x;
                ysize 	= 	pop_size_y;
//alert('Popup Größe\n\nX='+pop_size_x+'\nY='+pop_size_y+'\n\n\nAbgefragte Größe\n\nX='+xsize+'\nY='+ysize);		
        }

        x		= 	xres/2-xsize/2;
        y 		= 	yres/2-ysize/2;
	
	fenster.resizeTo(pop_size_x, pop_size_y);
	fenster.moveTo(x,y);	
	fenster.focus();
}