function openwindow(siteurl, b0, h0) {
		var ns4up = (document.layers) ? 1 : 0;
		var ie4up = (document.all) ? 1 : 0;
		var xsize = screen.availWidth;
		var ysize = screen.availHeight;
		var x0=(xsize-b0)/2, y0=(ysize-h0)/2;
		
		window.open(siteurl,"w0","scrollbars=no,status=no,toolbar=no,location=no,directories=no,resizable=no,menubar=no,width="+b0+",height="+h0+",screenX="+x0+",screenY="+y0+",top="+y0+",left="+x0);
	}