function bigWebcam(imagename) {
	windowprops='location=no,scrollbars=yes,menubars=no,toolbars=no,resizable=yes,width=400,height=400';
	imagewin=window.open(document.images['imgwebcam'].src,'imagewin',windowprops);
	if (!imagewin.closed) {
			imagewin.focus();
	}	
}