var myImage,features;
	var mywin = 0;
function openWindow(url) {	
	myImage = new Image();
	myImage.src = url;
	features = "locationbar=yes,location=yes,toolbar=no,directories=no,menubar=no,resizable=yes,scrollbars=yes,status=no,personalbar=no,left=0,top=0" ;
	if(mywin==0||mywin.closed) {
		mywin = window.open( url, 'imagewin', features );
	}
	else {
		mywin.location.href = url;
		mywin.focus();
	}
}